As mentioned previously here – there’s not much we can do without knowing what e-mail address you used.
The most common reasons for not finding the activation code are, in approximate order of descending frequency:
1 – The e-mail is sorted as spam.
2 – The e-mail address was misspelled when signing up, so it can’t reach the intended mailbox.
3 – A few e-mail services will block e-mail based on incorrect black lists. Thus it never reaches the recipient. We can usually see if this is the case if we know the e-mail address and the approximate time it was expected.
4 – The recipient inbox is full, and the mail server rejects the e-mail.
5 – The recipient e-mail servers are not responding immediately, and it takes a while for the sending to be retried.