No help

It is with grave disappointment regarding how my issue has been handled thus far. To clarify, I have called Momentum fundsatwork line, quiet a few times now, to update the contact number on my profile as I no longer have access to the one currently registered. The first time I called was back in July, it was quiet a lengthy hold but ultimately got a representative to help. I stated what the query was about and on that interaction I was advised that everything had been done accordingly, new number added, in addition my email was added too. I checked after a few days because I wanted to give it enough time, info was not updated. I called again recently and was informed that an incorrect format had been used to add my information and that this would be rectified. By the end of the call was again told everything has been sorted. I checked again after 48-hours, no update done. I've sent emails with no response and now I'm stuck.