You have a contractual relationship with the self-taught examination institution, and you need to determine whether there are refund conditions in the contract. If the refund conditions are met, you can ask for a refund according to the contract. If the self-study institution has not breached the contract, you do not meet the refund conditions, that is, you have breached the contract. You can ask the self-taught institution for a refund, but at the same time you need to bear the liability for breach of contract according to the contract.

Further education means that the school selects students according to their grades. If they don't study well, they may never receive education again.