Very very poor customer service

The worst delivery company DPD Laser/Dawn Wing. I bought an Adidas sneaker and to find the sneaker doesn’t fit. Logged a return with Adidas return was suppose to be 3 weeks ago but DPD Laser has been giving me massages of incorrect address but they delivered the sneaker on the very same address for collection. I’ve been calling for the past 3 weeks to get the parcel to be delivered to Adidas. Spoke to Chantel whom I was told didn’t do her work hence the delay. Called in agin this morning spoke to her again and she said she has escalated the issue to management. It’s almost the 30 days period before my parcel return date expires. Please can DPD Laser/ Dawn Wing come and collect the parcel so I can get my refund.