Stop *****ing my money with subscrptions I NEVER subscribed too.

I havew recently been experiencing problems with MTN, where I am getting messages that tell me I have subscribed to some or other thing, from 2.. per day to 99 per week. I reported it and they said they would escalate it. Nothing and trues nuts 2 days later it happens again..... I am not subscribing myself and is costing me money... which I don't have and time to go in and unsubscribe myself again..... What gives stop *****ing my money