Payment issues , services sucks

I have trouble with MTN now for the kast time i oay my bills every month and now they say i am 1 month behind i asked for the exact month that they did not receive my payment they cant give me exact month they can only tell me i am behind i have 75 emials to show i have been asking about that payment. Now i did payment on 2 months on the 25th Aug on there app throught there billing system now they camt pick up my payment i have send 2 times the proof of payment to them i am really tired of this they slipped up with the one payment i went and did a double payment now that payment they cant pick up. I do pay my mtn bill through there app always otherwise when the system is offline i go in shop and pay it there. MTN is not doing there job and i am paying them to do the job but they are doing a half job. If this is not resolved this week i am leaving MTN and will go to Vodacom or CellC i have been years with MTN and this is how they yreat clients they are getting worst by the day. Service is bad if someone asked me if i would recommend MTN to them i will say go straight to Vodacom thats how bad the service is at MTN