I totally sympathise with you OP, as being disabled I too find it EXTREMELY difficult to manage the shops these days. Last year I purchased something from Rymans online. It was delivered, but a part was missing. I emailed them, but rather than just sending out the part that was missing, they insisted that the item must be returned and they would send our a replacement AFTER they had received it back - the fact that it was something I needed urgently was irrelevant, as clearly they don't trust their customers at all. I waited patiently for the collection on the allotted day, but no one turned up! I called and they could barely bring themselves to apologise, just saying they would arrange another collection a couple of days later. As it happened, the person who came to collect, must have appeared at a point where both myself and my husband had popped out to the garage at the side of our house. We were only there for 2 minutes, possibly even less. I then received an email to say that they'd called to collect but no one was at home!! The guy hadn't even rung the doorbell, and could have clearly seen that the garage door was open, so had he even called out 'hello', we'd have heard him, but as so many delivery/collection people these days, it was too much trouble to spend a few seconds over and above arriving at the door. I was SO disgusted, that in the end I got a friend to return the item to the store, where apparently it took them an age to process the refund, and I now refuse point blank to ever use this company again.
I really don't think these stores understand how difficult it is for some disabled people to return things that have been purchased for them. I hope you enjoy your bubbles when you eventually get to drink them.