Desperately asking for help...

Hi N9 fellows, I've been following TMO and this thread every now and then. Started to use Wazapp since August, went through Wazapp breakdown times as everyone here did. My problem was that it always failded to get the registration code on my N9 itself, but I had several successes getting the code from other devices then enter the code on N9, and it worked. I think some users here know exactly what I'm talking about...

But since this big breakdown on Nov 5. I never get back to my Wazapp again. I successfully got the codes from my old phone or my friend's phone, then register with the code on N9, but then it showed "remove your account from the account manager and re-register again", I deleted my Wazapp acount, got the new code and tried again, still it asked me to re-register, and the same thing happened three (or four) times (everytime with a new code)!! Super frustrated...

I updated to the lastest version everytime when it came out. Had deleted everything Wazapp related and reinstall it. Didn't work out.

Please tell me what to do... I don't want to just give up Wazapp with my beloved N9!!!
Thanks in advance!