JDG service ***** me Off*

My account from Ruselles is been handed to JDG service.. Well we discussed how to pay my account which was absolutely good amount of monthly payment... Yes I'm paying it as we agreed off...but what *****ing me off* with this company service.. Even if I've just payed they keep on calling me,and they're call been charged on my account, and I've already send many email to them to stop calling me and check my account payment/statement first.. But still they don't stop... In a month I'm getting 5-6 calls from them and when I check the statement I have to pay those calls from them +-R15 per call the msms...*Ek is gatvol*