Billing department

Absolute bad service from the Afrihost billing department. 2 days now and no fiber connection, i have called in more than 10 times and all the agents are useless and ***********. I have changed my bank details and they still have no yet debited my account. i called in and used the WhatsApp chat option for them to retry debit on new account and still they say it failed. I want this resolved and my line reactivated.