Paid my account on the 30th December 2020(Payment due date is 31st) yet my account got suspended today(5th Jan 2021).

Paid my account on the 30th December 2020(Payment due date is 31st) yet my account got suspended today(5th Jan 2021). phoned 3 times and the issue is still not resolved. 1st call I ask the lady to send me a sms with the email address to send my slip. I then calls back for a second time and asked to speak to a manager and got placed on hold and the line got disconnected after 10 min. I then phoned again for the 3rd time, and again asked for manager to stress my bad customer service and yet again got placed on hold and this time it was for 35min and my R100 airtime gone!!!!! TOTAL BAD SERVICE!!!!! So I used up R100 airtime, payed my account a day before the due date and still my account got suspended.