PPF — ppf account not transferred

Address:

Ghaziabad, Uttar Pradesh, 201010

Hi
I (Ankush sharma) have a ppf account in general post office ambala cantt. I submitted request to transfer my ppf account from gpo ambala cantt to sbi indirapuram ghaziabad in may 2018. From last 4 months the status is same. Post office members said they already dispatched the documents to sbi. But sbi indirapuram said it will take time. I am not able to understand how long will it take?. Also please let me know who will give me interest for these 4 months sbi or post office?

Thanks
Ankush