Xtreme water doesn’t honor service agreements

Xtreme water didn’t honor their commitment to service my system for two years. I’m having a hard time to contact them as the contact number that I have is not in use anymore. Every month my debit order is collected from my bank account, it is virtually impossible to cancel the debit order permanently without having contact with the company it self. I stoped the dt order only for it to run again the next month. I find it very dishonest to say the least!