disgraceful service

I have an agreement in place from the 24 february 2021 to which payments have been consisitent and not faulted.On the 24 march cartrack handed this account to NBA who are harrassing me everyday.When i spoke to a consultant at the cartrack accounts department about 2 weeks ago,i was told that they have a recording of me promising an exhorbitant amount to repay the outstanding subscriptions.i asked for the recording and when i spoke to the same consultant,Mr Tembiso Sithole today who tpld ,he responded by saying he hasnt received the recording.I asked for a supervisor and was promptly put on hold for 30 minutes after which i had to cut the call.This is ridiculous and their service is disgrace***.