very bad service

i received a called from Mondo in Dec for a data sim card, i agreed to taking the sim card contract. when they delivered the sim card they sent 2 sim cards beginning of Jan, i called immediately 7 told them i dont want the 2nd sim card they said they are cancelling it immediately, to my suprize they debited my account for both sim cards i reversed it.. because i am not paying extra for a sim card i never agreed to.

when i call them to find out what is happening because MTN is now suspending my services they keep sending me from pillar to post & keep insisting that i must pay for both sim cards till they sort out this matter.

how do i pay for something i never agreed on & at this moment it has taken them a whole month to cancel a sim card i did not order how many years will it take for them to refund me my money,i dont want anything to do with company they do ***** how do you go & give people what they never agreed to , with out their authorization.