I'm sorry, but I don't have enough information to give you a specific answer about the delay in receiving your CAS (Certificate of Acceptance for Studies).
There could be a variety of reasons why your CAS has not yet been issued. It could be due to processing delays, incomplete or incorrect documentation, or other issues.
The best thing to do in this situation is to contact the institution where you have applied and ask about the status of your application and the issuance of your CAS. They should be able to give you more information about the specific reason for the delay and what steps you can take to resolve it.
I hope this helps. Let me know if you have any other questions.