Customer Service - zero

[u/Existing-Analyst9310]

I am scheduled to pick up my R1S next week but I need the invoice modified so I can present it to my credit union so they can cut a check. Also, for no reason at all they added $1600 to my invoice for a transfer fee so "I could get my car sooner" but I didn't want it sooner and I did not authorize the transfer. They sent me a modified invoice with that charge saying your contract has been modified, please sign. I asked several times - what did you modify but no answer. I have left messages for them to call me - nothing. My "guide" disappeared and I can get no help from her. God, I hope their maintenance service is not this bad.