United Colors Of Benetton — coat/complain about refund

Website:

ru.benetton.com

After ordering a coat from the online shop benneton in moscow and receiving my parcel i found out it didn’t fit me. Immediately i sent the purchase back by the post which should have been received by the online store managers in 2 weeks. By the post track the item has been there since 15th of december 2017. I have already called them for several time trying to define the reason of their absolute ignorance. I have only heard that there was some problem with the post office which was the only reason of the delay. It’s already january 2018 and yet i haven’t received my money (No refund) and still waiting for any news. I have no idea how i can act in this unpleasant situation.