Mtn Representative not very helpful

Called Mtn Customer care yesterday afternoon. I recently bough Mtn Airtime from the FNB Mobile APP on the 6th of November 2019. Since the airtime was loaded I am unable to use it. Each time I make a Voice call to any number, I get the message "You have insufficient funds to make a call".

The consultant I spoke to kept on insisting I restart the phone, switch of mobile data, switch the phone off for 5 min, etc. etc. I did make him aware that I tried this multiple times and even tried it once as per his request while I was online with him on the phone.

This is very unprofessional service as that did not resolve my issue. At the same time he did not sound very eager to assist me with my issue.

Please sort this out! Representative's name is Anthony This is on my other Mtn Contract number. Call me for more information