Wish complaint: Full Refund not given on order the seller cancelled

Hi
I purchased a smart phone on the Wish app on 6th of May 2020 and the delivery date was given as 24th of May 2020. Couple of days before the phone was due to arrive the delivery date was changed on the app to 10th of June. Again as the delivery date approached it was again put forward to 25th of June.
This was very annoying and frustrating but I could not cancel so I waited, 25th, 26th, 27th and 28th of June arrived still no phone. Finally on the 29th I was informed they will issue a refund which can take up to 14 days.
Two day later I noticed a partial refund into my account without the shipping costs. When I bought the phone I paid in MYR 310 (Malaysian ringgit) which is the equivalent of approx £59. The refund in my account was MYR 236 (Malaysian ringgit) which is equivalent of £43. My bank also charged me once for sending the money upon purchase and also for receiving the refund.
Why did I not receive the full refund?
None of this was my fault I stuck with my side of the contract and put up with Wish’s continuous delays and eventual cancellation. I did not cancel wish did I should receive the full refund including the shipping cost as well as compensation to cover for my bank fees and distress.