Office365 for Mac refuses to allow me to activate online

Hi there,

I have an online Office365 for Mac subscription.

Each time I open Office (Word, Excel, Outlook etc.) it'll prompt me to activate my subscription.

After keying in my details and successfully activating, the programs do not seem to register.

I have been keying in my online activation countless times and still to no avail.

Could someone help me please, this is frustrating, I might as well stop my monthly subscription!!!

Thanks.