Poor service and overcharging

MTN did not cut me off after my usage limit was exceeeded. I spent hundreds of rands of usage before i was finally cutoff.. I complained and MTN' response was that the usage limit was not for entire bill but only out-of-bundle charges. I asked MTN to show me where this is specified on their website when usage limit is being activated. No response from MTN. SEcondly I asked MTN for my loyalty point history. MTN response is that their system does not provide. I asked MTN to escalate as I need this history to check my usage. No response. DO NOT CALL ME. EMAIL RESPONSE to ********** I require responses as follows:

1. Why does it always take a Hello Peter before MTN responds? Why are my queries ignored? 2. I require my loyalty point history. Even if your system does not provide then your backoffice IT team should be able to provide. 3. I require all charges after my usage limit was exceeded to be refunded as you do not specify that usage limit is based on out-of-bundle. This must include previous usage limit exceeded.