Pathetic MTN Service

I have recently had to do more roaming than usual, which has depleted my airtime and voice minutes. I now find that I cannot purchase more airtime or voice minutes. The MTN App does not work. Purchase from my bank failed. I also recently refused to renew my contract, which I guess MTN did not like, so it seems that have summarily dumped me, after I have been a Client for over 20 years. Tried the MTN Helpdesk and after 30 minutes of getting bounced around to three different departments I gave up. Pathetic service.