Help! ETH stuck in BNB network.

Long story short, sent some ETH to a wallet via the Binance smart chain network when I should have sent in through the ETH network.

I am in Canada and when I go to convert the ETH on BNB to the ETH network, it says I need to purchase BNB to cover fees although there is no exchange that I have found that allows you to purchase BNB.

I just want my ETH on the ETH network.