Worse experience ever (****)

After paying for almost a year they just send me a e-mail to say I have to pay some of my debt myself. The day I signed up all m debt was on the agreement 2 months later a lady called me on a Saturday night to say they have to increase my debit order. Last week they send me a mail to say I have to pay one of my accounts myself and don't have not specific reason for it. So last week I mail them and told them to cancel they services but till this day no reply. I've e-mailed them 7 times, phoned them and get told that they will get someone to get in contact with me, till this day no one contact me or emailed me. This is a disgrace they way they handle issues. I mailed them several times to cancel they service no reply but they can phone you on a Saturday night to increase debit orders. Please cancel your service immediately, you will not take a cent further out my bank account. Since I started with them I received phone calls and e-mails everyday from service providers till this day. When I've paid my debt off by myself I never had that problem and I emailed them several times to tell them about the harassments but it never stop. I've paid them more than R25k so far but they don't pay my accounts. Please end your services with immediate effect, you did not hold up to your agreement or I will be force to take legal action.