Adidas — I am complaining about not refunding my money

I order a pair of shoes from adidas on 09/07/2022 and I received it on 13/07/2022. Because it was not fit and small in size on next day I raised a return and On 14/07/2022 a dilivery boy came and take the order back. From that day today is 08/07/2022 (25 days) i didn’t receive my refund. Before I order the product I was able to call customer care but now call never connects. They emailed me and said you we will send you email for bank details in 2-3 days but there is no email yet please help me