This is a user-to-user forum so we can't help solve this issue. You'll have to keep working with Customer Cares. You could try reaching them on Twitter.
I ordered a xps 8940 from dell outlet and it's listed with a rtx 3070, which is the main reason for the purchase, I opened the computer when I received it and it did not have the graphics card. I have spoken to technical support and customer care and been transferred between departments at least 8-10 times, one of those times I was told I'd be conferenced with both departments to resolve the issue which resulted in another transfer and when I told the next representative to conference me with both departments, agreed then hung up. I really don't want to have to return this build but if I can't get what I was supposed to have in it it's an absolutely overpriced pc, with less value than the other one I purchased recently. I'm not really sure what to do at this point other than being forced to return it outright.  
XPS 8940, help getting a missing graphics card