spouse visa phone call interview

[Khan9]

Hi

Please Can any one help me,I’m britsh Pakistani
I Married in August 2017 in Pakistan and
apply my wife spouse visa 27 December online application ,biomater taken 15 January,send documents to Sheffield on 15 January and recived document back 29 January,recived phone call from Home Office on 19 February,asking me questions all most about my works and my married,when they ring me that time I was of sleeping and I forget my wife date of birth and all others questions I give him right answers...
I work in as employed and self employed as cab driver end I eared lase year £19403.i send him all my documents includ sa302.

So please any one advise me It that any problem I forget my wife DOB?and after phone call interview how long normally they take to reply.

Thanks