So this afrihost AirMobile network are ******, they changed me service fee of R50 and I refused to pay for something I didn't use now they blocked my numbers

So this afrihost AirMobile network are ******, they changed me service fee of R50 and I refused to pay for something I didn't use now they blocked my numbers. I am unable to use my phone or my number because this ****** that only allows you to buy airtime or data via bank want to milk me dry. They charged me for bounced debit order that I didn't authenticate on my account so they're double charging me for anything I did not use they want to ***** my money from my bank in the name of service fee and unpaid debit. I wish there was an option of posting their invoice so people can see for themselves what am talking about. AirMobile are ****mers