Codecanyon allows you to write reviews if it is 5 star only. If you give less than 5 stars although it is buggy code, they review your review. They delete the review and they hide the review button.
I purchase code packs and plugins from a seller called themesic. One year of support was completed, they couldn't fix the problem. Most of them are buggy. Anything for Perfex CRM, don't buy It will crash the whole system. I had to ask the Perfex team to fix the problem. Now they know the problem exist, I had to go legal fight to refund money. Now they block me from writing review. Don't know why.
These people sell buggy code and if you raise a question, then they block you. They have taken so much of my money.