You don't.

引用自 mimoyathara：

Since i got a large number recent of refunds, steam support cannot refund my game on steam again. Please help me how to get a refund again

There is no magic easy button to circumvent the restriction. If Support is refusing you because you abused the policy, that is it.

引用自 mimoyathara：

Since i got a large number recent of refunds, steam support cannot refund my game on steam again. Please help me how to get a refund again

If Valve restricted your refund privileges, it means you've refunded a lot and ignored several warnings about excessive refunds.

引用自 mimoyathara：

Since i got a large number recent of refunds, steam support cannot refund my game on steam again. Please help me how to get a refund again

You should have had several warnings beforehand after some successful refunds that you might take it overboard and that they may restrict further refunds if you don't cease doing this.

You didn't heed the warnings. Now live with the consequences.