Held hostage by MTN

I have repeatedly requested cancellation of a month-to-month deal, but have been met with unhelpful responses, repeated transfers between agents, and irrelevant sales pitches. Despite multiple phone calls to your 135 number, discussions with various service agents, and four emails, I have received no resolution or satisfactory assistance. I sent an email to their complaints team and Portia Viljoen, Specialist - Complaints Management, responded but provided a generic response reaffirming the 30-day notice period. I explicitly requested that she review the call recordings to verify the conflicting information provided by MTN agents. Despite my follow-up emails, Portia has not responded or provided feedback on the recordings, clearly a complete disregard for my issues.