Wish complaint: Item not received and being ignored

I received notification that an item I had ordered (their ref: 5ee52aa260f138009c097e8d – £82 including postage) had been delivered. I was in all day due to lock down restrictions and no one called at my flat. On checking my postbox there was no ‘sorry we missed you’ card saying the item had been left elsewhere or that I needed to collect it. I tried to contact Wish, but they only have an automated system that told me that I needed to wait until 2nd July to get a message to a human support agent to help me, and that my parcel may still arrive (which contradicts the message they sent me saying it had arrived). I eventually made contact with the Wish Support team who said I should check with the courier company, I pointed out that I had no way of contacting the courier as the contract was with the seller and not me, and they should be pursuing this as it was not my responsibility. after this they decided that they had resolved my issue and closed the case. I have subsequently re-opened the case on numerous occasions over the last 7 weeks, each time being told a support agent would be in touch within a few days, each time no one contacted me and the case went back to saying it had been resolved. So I am £82 out of pocket, Wish are offering absolutely no support, and haven’t from day one. All I want is either the item to actually be delivered or for Wish to refund me the monies they have currently stolen from me.