Refusal of application can be happen at any stage under following.
Applicants can be refused at anytime during the process of the application, for any of the following reasons:
• Proof of Language skills
• Criminal issues (have criminal record in any country)
• Security(failed background checks)
• Medical (failed medical exam)
• Financial reasons (have less than the minimum settlement funds
• Misrepresentation(failed to be truthful during the application or omitted information)
• Non-compliance(failed to provide any requested information/ documents the immigration officer requested or failed to attend a
Personal Selection Interview)
• Inadmissible family members (the above reasons for any family member indicated as dependent on the application form)
But I'm sure if u have got per email and non of the above is applicable no need to worry
waiting is hard. I know
good luck