dlc sales

I purchased the Q1 2022 DLC pack, but did not initially realize it was in my copy of the game the first time, and accidentally purchased it three more times. Is it possible to get a refund for the three extra purchases?

How difficult would it be for Studio 397 in conjunction with STEAM to implement a credit voucher system on already purchased items? It has happened more than once, wherein I wanted a particular car or track but it is bundled with something I had already purchased. An good example was my purchase...