Missing items, no responses

I’ve never ordered from Adidas online before this but I found a few things which I really liked. One of the items was a track suit however when I received my order, the track pants were not there, just the track top. I emailed customer service and have still not gotten a reply so I called the customer service line today. I was told that the item is out of stock so they cannot send me the pants which I am missing but that they can try contact the warehouse and see if the pants are still there but if not I will then have to log a return for the top. I would have liked to keep the track top but I will then not be refunded for the missing item and I’m not willing to pay the amount of the full track suit for just the top. Anyways, I was told that once they check with the warehouse and confirm, if the item is not there, I can then log the return as long as it’s still in the return window period of 14 days - bare in mind that I’ve waited over a week for a response via email and now there is 2 days until this return window expires and I highly doubt that they will get back to me within this time to confirm whether they were able to find the item or not which was not even my fault to begin with. Highly disappointed and I won’t be ordering from Adidas again.