Problem with game zombie io

Hey, so I have been playing this game ZOMBIE IO, and like most game it’s started with just playing it then decided to get the no adverts £9.99 and buy gems £0.99 but the game has bugs it never game me one item I paid for, so thought it was me then while playing a level i got enough gems to buy a pack and got a !( S teir weapon ) went to inventory to find it not being there. I decided to message them and they never go back to me for a day and then told me can you take a video of it and I was like unfortunately it’s already happened. They reply was we need to see a video of it happening? I was like, I don’t have a time machine to go back in the past to have a look at this to record it to send it to you, this got me nowhere , so a update come out , and it full of errors took a picture .. messaged them about it no reply to that, deleted the app reinstalled it in case it was me on the iPhone but it was exactly the same same again. I’ve decided since then I was going to buy another pack at 99p but been too quick and hasty. I’ve clicked on at £29.99 pack and I’ve asked for a refund. My refund was accepted and then bought the 99p pack instead to log onto to play the game and found my account was banned. I have messaged them again I have been told you can no longer play the game unless I pay for this £29.99. Item. Even though I never used it, I’m sure they could easily take it off or wipe it off however they do it. Plus for whatever reason I can’t seem to play the game outside of my house as it tells me it can’t connect I have full 5g even put 4g on and it won’t connect unless am on WiFi.. also mentioned this too them and got zero reply, They have banned my account that me losing any money I have put into this just wondering what my options are as I think they are very unprofessional, specially banning me, is it just me? Mm is this in some sort of violation to apples terms and conditions thank you