Worst service in history

I paid for license renewal through MTN Momo app on the 20th of June and got a message that it was on stage 2 of 5 only for it to go back to 0 and state "not started". I called 135 numerous time with no luck and no one can seem to give an answer. My livense disk expires today 30th June and I would like my money back so I could process it somewhere else ASAP. Not in airtime not anything else but cash.