DEVICE BOOSTER NOT SHOWING ON APP - REFUSE TO ASSIST

I am uttely dissapointed with the service delivery for Vitality . I am trying to activate the Device Booster on my app for the past 3 days.The option is not available at all . I have phoned numerous times to the call centre and they just dont solve the error . I have been told on Wednesday 5 times that i need delete the app and then install it again which doesnt solve the problem . I was told this yesterday Thursday as well and still didnt b solved . I phoned again today and still not solved . I wanted to buy the device on Wednesday and today is Friday that I still cant purchase the device .Vitality promotes healthy living but this causing so much stress and leaving a bad taste in the experience . I am tired of calling and waiting to be assisted . I have wasted so much time on this , data and call cost which wont be replaced. I have asked them to activate this booster manually but they refuse to . The website does not allow one to activate this but refers one to the app that clearly doesnt work . I have sent screenshot via email . CAN I GET URGENT ASSISTANT REGARDING THIS TODAY