Ridiculously POOR Online/ App Service

It has been around 5 weeks since I first contacted Discovery to tell them that my Vitality App was not working (since leaving Discovery Bank and them choosing to integrate the two platforms - in closing my bank account it somehow messed with my vitality account). I've since sat on the phone with a host of different people for WEEKS, no one actually has been able to fix the problem. I've been told it's been fixed only to send screenshots of error messages - I've done all the updates / followed all the instructions, even their IT dept has said 'we don't know' etc. This has meant no vitality points for weeks - no way to access my miles or claim rewards. And NO end in sight- just lots of 'we're working on this'. Beyond frustrated and annoyed.