Inability to Roam with MTN

For the second time in a row MTN has now dropped the ball regarding roaming. Last year I enabled full international roaming before leaving for Botswana only to cross the border and have to drive for 900+ Kms of remote countryside with no service their response on my return was they did not know why my roaming did not work! I once again enabled full international roaming 3 weeks ago before leaving for Thailand, this time I has SMS and Voice active but no data, I emailed customer care immediately and finally got a response 8 days later to please submit all my details (I have been a client for the last 28+ years! You Have this already!) I was eventually forced to purchase a local eSim in order to be able to communicate. This service is absolutely pathetic!