The worst company ever

I have an account with Mtn which i was payingg via debit order. My debit order was cancelled by mtn without my knowledge and no one called me to find out what's happening.

To my suprise, this month I received an email a company called Saya recoveries telling me that my account was handed over to them. I have NEVER received any calls or emails from mtn that they are handing over the account. I have mow settled the arrears with them but my account is still listed. Mtn has my cell number, email, even my work landline but they never bothered to contact me.