Discovery Health - I can’t access your website or app!

I am currently working in Mauritius and will be for some time. I am trying to access my discovery policy via the app and the internet, but as Discovery have implemented a two tier security, my logon details are not enough and they keep sending me an OTP to my SA cellular number ( which doesn’t have a roaming agreement with Emtel in Mauritius) as I am on prepaid here , I cannot call international to the helpline! I tried WhatsApp, but just keep getting referred back to the app, which I cannot access. I have tried sending emails, but they just bounce back to me . I need someone to call me in Mauritius to remove the “two tier” or just change my OTP to email me rather (as the bank has done) It’s so frustrating as the extra security was not requested by me !