Poor service

I have made payment for the cartrack in march and april this year, I have emailed proof of payment but they have not update their records, they keep telling me that my last payment was in November last year, I always receive calls asking me when m I gona mm make payment but they do not update their records about my payment. All I want is to capture those two payments before they demand other payments. their administration is failing because they cant find my emails, they always give me email addresses to forward the proof of payment but there is no progress.