If this about a product purchased from MQL5.com Market, you can cancel it through your purchases, if you haven't installed and activated it yet.
https://www.mql5.com/en/users/sad3031/market
If this is about a MQL5 VPS subscription purchase, you can cancel it within 24 hours and get an automatic refund to your MQL5 account, by going to your MQL5 VPS >> Cancel subscription.
https://www.mql5.com/en/vps/subscriptions
https://www.metatrader5.com/en/terminal/help/virtual_hosting/virtual_hosting_terminal#cancel
In any case you can't transfer funds from one MQL5 account to another, and more importantly you shouldn't have more than 1 MQL5 accounts, its against MQL5.com rules.

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I logged into the Meta platform online using my Google account, but I didn’t realize that the terminal ID was different and made the purchase. Because of this, I had to purchase it again. However, I cannot use the remaining balance on the account linked to my Google account. I would like to link it to a different account—how can I do that? My balance is currently stuck. Alternatively, could you cancel the purchase? I am trying to purchase a VPN right now, but I can’t do anything because the account is incorrect. Please help me resolve this.