Have been trying to reach a human at Dell since December 2024

Does anyone have any insight into reaching a human by phone at Dell? I made a purchase as a consumer in November, the item arrived later than promised and I wasn't able to use it for the intended purpose as a result. I initiated a return. The item was unopened, unused, and in original sealed shipping box. My wife also returned a similar purchase at the same time for the same reason. I was charged a $451 restocking fee. She was not. I attempted to contact Dell to inquire about the reason for the restocking fee (it was a personal purchase - the restocking fee policy at the time explicitly mentioned business/commercial purchases may be subject to a fee, but no mention of personal). In any case, the item was brand new, unused, etc. When I was unable to contact Dell after 11 separate attempts by phone where I was unable to reach a human (the phone system just repeatedly says the department is closed and to try during regular business hours but I'm calling between 9am-6pm Central Time from Austin) and two cases through online support (the character limit didn't allow me to explain the circumstances at all and the one case that was responded to just received a templated reply instructing me how to request an RMA, but didn't address the actual issue and nobody replied to my resulting case) I had no choice but to contact the credit card issuing bank and initiate a chargeback case. Upon initiating the Chargeback case, I received an outbound contact attempt from a Dell chargeback specialist by email requesting information about the chargeback claim. The bank instructed me to not engage them. The result was me winning the chargeback case and getting the refund. 3 months later, Dell has sent a super sketchy PayPal invoice to my former employer requesting that they pay the disputed amount as they were unable to re-authorize my credit card for the amount. I am extremely concerned by this practice - especially given the unopened, unused condition of the hardware that was returned and it being within the return policy. Why is it impossible to contact Dell?