MTN Block Number

On the 28th February I reported my data card ******. I requested that the lines linked to this be blocked, suspended and cancelled. I received an SMS telling me that my account will be suspended as I owe money on the MTN account, after phoning MTN I discovered that these were charges accumulated on the ****** card after my report and request to suspend the sim cards. NOW - My current cell phone has now been suspended because of charges trumped up on the BLOCKED numbers after the 28th February. I then called MTN on the 12th March and they said the amounts would be credited to my account as the fault was on their side. This morning on the 13 March I have now been cut off, after they assured me I would not be cut off. I have had to phone them back now at least 8 times and keep getting cut off. I do not see why I should be negatively effected because they cannot do their job properly. MTN your service is shocking and after being with you for over 10 years now I will be looking for a different service provider and going onto social media with this.