Terrible administration and accounts nightmare

Accounts/ billing nightmare!

MTN service and administration especially regarding their Accounts and billing are absolutely **********.

My husband moved from FNB to Discovery almost six months ago and has immediately changed his banking details but still MTN would deduct the debit order from FNB which gets rejected then, my husband would then pay the amount in store just to be cut off every month. He has spend how many hours at the MTN shop already, then they say everything is now set up and fine and the next month is just the same neverending story!