unhappy customer

A sales person called me to upgrade my current contact only for me to be sent another sim on Monday the 15th. Went to an MTN store to inquire why only to find out i now have two contract which i clearly told the sales person i don't want and he asureed me it wasn't. At the store they couldn't help me close the account and was told to call the *** number only to be sent from pillar to post and in the process using up my airtime of R30 with no help. I cant even understand why my airtime got used up but am calling with an MTN number. Am considering canceling everything cause the service you guys give is totally bad