Increase limits without my knowledge

I've been struggling to get answers from MTN for over 2 months now. When I got a response it was multiple times unacceptable answers.

I took out a contract for my daughter and told the sales rep that I can only pay the contract amount and NO addisional charges. This is why she set my limit to R0. I have copies of my signed contract.

All the sudden last year my daughter's limit were increased to R2450 for dara usage. When I saw my debit order I queried it and changed it back to R0.

Based on my historic way of work MTN can see that I always buy airtime via my Banking App. Never did I increase my limit.

MTN did not do any affordability check. Me the main account holder did not sign off on this increase. And MTN phones my daughter to do Sales. We are talking here

1) MTN breach of contract I've signed for a R0 limit. 2) Consumer law No affordability checks were done 3) POPIA

I am a client at MTN for over 20 years. This is how you treat your customers?

You state in your answer "The limit is not a guaranteed service"

Does your MTN customers know about this? Why then can the limits be set on the contract which are signed?

You are in breach of contract. I am going to log a complaint at authorities mentioned above. I want my account to be fixed and if not I will never do business with you again.