no confirmation email and no activation code received

I purchased the Ultimate package (multi used) on June 26.
Up to now, I have not received either. Anyone can help me?
Thank you…

This is usually associated with an incorrect email address given at the time of purchase.

How and where did you purchase ?

You could try this link: - Troubleshooting License Activation problems - https://support.avast.com/en-ww/article/Troubleshoot-activation

Also - https://support.avast.com/en-ww/article/76/#pc

This method is not available, is there any other more useful method?

What do you mean by not available ?