Unfair treatment always.

I took a vehicle for exchange because it had reached 15000 km and i was given another vehicle and not the TSI i was driving, Avis advised there was a min scratch on the vehicle, now i paid my subcription R10 000 and i was again not made aware about the extra maintanance charge which is R2700 mind you i'm on leave with no access to my emails, they dont call or anything, they have sent my vehicle to recoveries for R2700 on top of the R10 000 i paid, i tried to explain to them i will pay the remaining R2700 together with my next substription fee no they dont care about that they want to recover the vehicle.