FRUSTRATED BY AVIS STAFF AND BOOKING

Can someone that actually knows what they are doing please contact me to resolve my issue. I have booked a car, and put my husband as the main driver but used my credit card. Now I have been advised that the main driver and credit card holder should be the same person. I asked them if we can change the payment then, and they said no, we will have to add another driver. After some discussion, I realized that it is not fruitful to try and sort it out this way because the people I am talking to clearly do not comprehend simple instructions. I decided that I would then rather make myself the main driver, and then add my husband (and pay the extra fee that we never wanted in the first place) so I can just sort this out. I requested that I then be made the main driver, and my husband be added as above. Now they tell me they cannot do that. What the hell AVIS!!!??!!! How do you suggest something to me, and then when I agree you say you cannot do this. Please contact me to sort this out as I am tired of useless exchanges with staff that don't know that they are doing and keep on advising me different things.