Cartrack accounts department are the worst to deal with

This company is the worst they keep calling to say that I owe them money and that my account is in arrears they sent a WhatsApp payment link I have made 2 payments via their WhatsApp link and no days later my account is still in arrears they keep calling and when I provide them with proof of payment they say that they will email the allocated department and then it just goes on repeat with a different agent when I tell them I have called everyday I have emailed them everyday and always provide my proof of payment my account still remains in arrears I'm so tired of going back and fourth with their agents some of them are rude and they say that the previous agent who assisted has not emailed the allocation team . No1 gets back to me they just call to make a payment arrangement for payments they already received I even called my bank and they confirmed that both payments went through successfully to cartrack