MTN ********** Billing

In February I upgraded my contract to a sim only with a su scripting of R699... 3 months down the line I was still paying g the subscription of R 1044.00 instead of the R699 I the went back to the MTN outlet I woodmead they then stated that the contract has been referred to the billing sector with further asking they then changed the story to say that they had not yet uploaded the contract to the system and would fo so and will refund the outstanding amount I have been calling and trying to get help but to no avail tbey then started to block the line on my side saying I owe them funds yet they are the ones who owe me R1760 of ******** deductions as I speak its been 6 months of continuous calls being sent from pillar to post with no help i was warned that I should not renew my contract witb them but being loyal and having been with MTN for over 15 years I did not heed to that call.... i can safely say MTN has zero service delivery and would not recommend it to anyone ....during the constant calls and emails I have been told of how short staffed they are that Covid is affecting them and that the billing sector is overswamped this horror started way before the pandemic