Debit reversal

I'm here regarding this stupid network provider. I lost the sim card over 3 montha ago and for the past 3 months the debit was not successful. This month they debited me. I am requesting for my funds to be put back on my account as i have not been using the services and the fact the sim is lost. I was told that they can't assist me since i haven't canceled the agreement. My question is why was i debited even after 3 consecutive debits that failed, shouldn't be the agreement be terminated automatically? As per cpa? I would really loike to have my money back. Right now i have a lot thag I'm struggling with and i am in desperate need for the money.

The lady i spoke to over the phone could not answer my question nor read the terms and conditions regarding the billing procedure