this is not how bitcoin works.
if some group of people have their own blockchian that blockchain is an orphan blocks (or Stale Block not sure what it is called), it means nobody else outside of that group of people recognizes the transactions (they are not of the main blockchain which is the longest) in those blocks and eventually they become their own network so you will never see any bitcoin that you withdraw in your wallet.
also if you deposit and they include it in their own blockchain you didn't really spend it because of the same reason, they are their own fork

they are those grey blocks who nobody cares about
https://en.bitcoin.it/wiki/Block_chain