Poor service and Client's ignorance

Hi

Firstly I don't want to lie their network works very well but if you experience any issues, you are on your own. When signing this contract they said is month to month and gave the account where they can take the monthly subscription but they've never debited my account, I've made multiple calls to them asking the to debit my account but they ignored my request, now as we speak they've now suspended their service because obviously I'll owe but why did they ask for my account number if they are not going to debit it. they don't answer calls and not replying the whatsapp messages anymore. is there a way we can get assistance?