Cannot convert Airtime to data

I called the call centre yesterday after persistent problems with the *147# ussd code ,I explained to the consultant I am unable to convert airtime to data .Every time I enter the prompts to select the data bundle I'd like to purchase I receive a message advising of a connection problem or Invalid MMI code.<br> <br> The consultant advised me to reboot my phone, I told him I already did it prior to calling the centre, he then proceeded to manually load the bundle as per my request however the initial problem was not resolved or no attempt to refer to the correct department. I explained to him the same is happening to my top up contract, without hesitation or listening to my issue he advised me to contact an alternate number because he does not deal with contract enquiries.<br> <br> Im at the point of porting my prepaid number ( it was a contract refused to upgrade) to a different network, and as soon as my other contract expires in May I will cancel. Its enough that I have signal issues all the time but being unable to convert my airtime to data is the last straw. I am reliant on my email accounts linked to my phone not being able to load bundles is expensive.<br> <br> Can someone please resolve this