Activate License

Hi, We purchased Business teamviewer on the 17th April through the trial version we were using but when we go to activate it using the link in the email you sent us, before signing in we receive a 'The token is invalid' message and after signing in the account still says its the free account.

I have tried re-installing teamviewer, and read masses of your help files but still could'nt activate the business account, every time it went back into the Free nav/profile account with no way to activate our new business account. I deleted that Free profile thinking that I would try setup the account again after following the activation link from my email but it still logs into a Free profile only. How can we activate our Business Account??? we are going round in circles. PLEASE HELP.