Dreadful customer service from Momentum Health (Multiply)

I joined the Multiply programme run by Momentum in December 2018. Now April, five months later, and they still cannot add my Active Dayz so that I can earn points, despite hours of communication, I have supp**** screenshots at least 3 times, I have left messages and emailed them but they either (a) don't respond, and if they bother to reply by email, they are (b) completely and utterly unhelpful and unable to assist and incapable of helping. I have resigned my membership in complete and utter frustration. Come on Momentum, where is your customer service ethic? how can you afford to just discard customers like this? do you already have enough revenue that you don't want more customers? Despite escalating my queries to a "manager" your team is still incapable of assisting??? really?