Bad service/unhappy client

I have had tracker with MiX Telematics Africa since I bought my car in 2016 and I'm currently experiencing a very disappointing service from them. In April this year they've debited my account twice and when I called to find out why, I was told that they didn't get a payment for November 2022. I sent them a proof for payment I did in November. I even got a reference number. I then reversed the debit order and hoping they will do the update. They then debited my account twice again in May and when I called their customer service on the 3rd of June, I was given a bad service by the agent called Zinhle who even dropped a phone while we were still talking. I called again and asked for the reference number for the call and she answered with a bad attitude that there's no reference number. I requested that they reverse the other payment as I can't keep doing reversal as this is affecting my credit record. I haven't received feedback from them even today and my money is still not yet reversed. This is really inconveniencing and their premium keeps going up. This is ridiculous.