It is also telling that you only finally decided to communicate with me after learning that I had asked the credit card company to reverse the charge due to non-delivery and inability to contact the vendor. A customer should not have to jump through these sorts of hoops. I am very sympathetic with those who have medical issues and/or have loved ones who do as I, too, have been in similar situations. But there are more than 2 of you in the company, and someone should have responded at the very least out of courtesy.
Having ran an eCommerce site for a company larger than Hahn, I can say from experience that the time frame you gave them to receive your intercooler was inadequate. Shipping time from FL to CA alone is 6 business days. From time of order, you gave them 9...and that included the week before Christmas. Now even if they had the intercooler on the shelf this wouldn't be long enough in my book before issuing a chargeback...a recourse that will not only take the money out of their account but also will cause in them paying an additional fee.
I have received a package from UPS before the tracking information for that package has reflected that the package had even been picked up. It is the exception, but it does happen. Considering I'd ship 30 packages a day for over 3 years and I can only think of it happening twice, it is incredibly rare occurrence.
Now the intercooler wasn't sitting on a shelf but rather had to be manufactured. An intercooler won't be built in 3 days. However, a shipper can print out a shipping label ahead of time to expedite shipping time. Until it is picked up, it will reflect a label has been made but the item remains unreceived.
Whether the shipping issue was because of UPS being overworked during the holidays, Bill printing a label before the product was finished, a combination of both, or some other issue...9 business days is not long enough before issuing a chargeback when 6 days of that will be in transit of shipping.
You ask for proof of UPS receiving the package but Hahn, or any other shipper, has no way to provide "proof" of when a package is picked up. When UPS comes to pick up packages for a business, they scan the package into a the driver's hand held reader and load it on the truck. Until that reader syncs up with the UPS network, there is no update to the tracking number. The shipper is left with nothing but the receipt of the label they printed out. That receipt is only proof they made a label, and nothing else. Hahn, or any other shipper, has absolutely no way to "prove" a package has been physically picked up unless they take a picture of the driver handling each package they ship...which, like you said with UPS's track record...would be a huge waste of money and resources for something that may never plague them.
I get the frustration of not getting a return call or email to follow up with your order. I prided myself on making sure all emails were answered within 24 hours of them being sent during the work week. I still am that way when it comes to my professional emails. Nothing sits in my in box during my working hours for more than a few minutes. So not getting a prompt reply bugs me. I don't hold them to my standards though and will email, give it a couple days, and then follow up. (I'm trying to get better about putting all my info in one email rather than 2 or 3 but not always that great on doing that. LOL)
So I get your frustration, but I feel in this case you have brought some of it on yourself. I still don't know how this all turned out (did you finally receive the intercooler? Did you buy a different one? Last time I talked to Curtis he was still waiting on one) but once you issued that chargeback, everything got more difficult. This is why you don't do that until the week before your bank won't allow it if you haven't received any satisfaction.