No Account with MRPmobile but i get debited.

A MRPmobile agent called me with an offer of a new device and and i agreed and the device was delivered to me<br> but i so happened to have bought myself a new device before i got a device from them and when i received their device i sent it back within the period specified to return a the package and a courier company was sent and i gave back their package within two days of receiving it and i called the call center to confirm if the device was received and it was received, it was still in good condition cause i never opened the package.<br> Now i get debited every month for a package i don't have and i keep calling MRPmobile to tell them to close the account cause i don't have an account with MRPmobile and i have been taken from pillar to post and every month i get debited for an account that doesn't exist.<br> Am very dissatisfied with their service its like no one knows whats going on and one needs to keep calling every week to find out whats the progress on the deactivating this account and these no feedback from them.<br> Am at a point where i don't want a account with MRP as group and am seeking legal advise about this awful experience am having with MRPmobile.