Adidas — Refund delayed and no contact

Website:

www.adidas.co.in/help?hcid=DELIVERY

I have ordered A Windbreaker jacket through cash on delivery on Adidas App.I returned the product on 22April and on 29th April I received a mail stating that I will get my refund in my bank and it will reflect in my bank in 7 days.But I have not sent any bank details and they have not mailed me asking my bank details.When will I get my refund?I have tried to call Adidas on this number [protected] but a music plays and after that the phone gets cut.Tired of doing this
My order I'd is AIN[protected]