Club Factory — return pick up not done

I bought black colour d13 smart watch on 7/12/2019 for 669inr in club factory but red d13 smart watch got delivered on 14/12/2019 and i applied for return/ refund on 14 dec 2019. They agreed for return and said 579 inr will be refund and product will be picked up on 18th dec... Totally unfair because its their mistake of sending a wrong colour product. Then also i agreed and they didnt pick it yet and today is 18th dec. Please return my 669 inr. I dont need your product anymore.