Homechoice review: Payment arrangements non stop calling

I made arragements to reduce my payments due to a pesonal reasons. I spoke to a agent . As i fell nehinde Made new arrangements and changed the debit order so o can start paying again . Since that happend i get called none stop again. I work shifts an cant take calls . What must i do speak to every agend twice a day a make the same arangements 24 /7
Please let them stop calling