It has been an year since using this material is still as good as new

I world like to suggest that please change your delivery and return partners. Worst experience ever. I am a loyal and regular customer in adidas form long time offline. I got to know there was a exiting offer in online, so bought 2 T shirts Order:AlN91193890 on the 1st order and later polo shirt 1 Order: AIN91193905 2nd order. The size which I had orders was XL for both the orders so it was not a proper fit. I thought to exchange and went to the process. Order number AlN91193890 is as having L size so went for exchange and order number AIN91193905 was not having L size so I went with return with refund. But worst delivery partner has collected a wrong order number AlN91193890 instead of AIN91193905. I had informed that I have first returned AlN91193890 and later AIN91193905 this but the delivery partner argued and collected wrong. Seriously felt really bad today with another delivery partner behaviour. And today I got to know the mistake for the delivery partner. The delivery partners or return pick Partner’s are rude and will not collect the cloth on the day which you inform us on the website or in the app. They cancel the pickup for 3 continues days and not pick the calls. I am really disappointed with the service from Adidas. Please do the needful and stout the issue asap because I am planning for abroad trip in JAN. I lost time, hope and really not satisfied with the service. Worst ever.