*****ulent upgrades

I did an upgrade 3 weeks ago on 1 number and the person upgraded 3 numbers and I did not consent for the 2 numbers, called MTN to rectify and they completed the ticket/call but the charge was still high on my app. Called to ask if they fixed the debit order amount and was sent from pillar to post, held on for more than an hour. I got debited the high amount and I went to the bank to reverse the debit. No one called me regarding the 2 upgrades reversal of fees. Now MTN has suspended all my 3 numbers and the amount is still not fixed so I pay the correct amount. How I’m a charged for 3 upgrades when I upgraded 1 number initially? Someone called me last week and I upgraded all the numbers to the new package. Can the amount be rectified so I pay the correct amount and have my services unsuspended.