Failure to reconnect sms service

Sms messages regarding activity on my cheque account have not been received for three months. I first complained in May to Pinetown branch. When problem not resolved I contacted Musgrave (which is where my account was originally opened). I subsequently phoned the call centre. On each occasion I was told that I would be reconnected to the sms notification service. It is not a problem with my phone because I am receiving other messages.