I have lost all my ZKS. Where is it?

I have staked around 48.60565098 ZKS on 2021-03-06 00:06:24. After almost 1 year, I login and want to unstake and withdrawal my ZKS, I cannot find my coin anymore. However, I found the below transaction record which someone has sent me 47.418554 gZKS back with zero value and I cannot find the gZKS coin in my wallet. What’s happening? I felt this is a central financed project which can transfer your wealth anytime anywhere without your permission. Horrible!

https://v1.zkswap.info/en/account/0x79e6360dce8427a8e292a20e93286079dfeeeec1

You can claim the toke after the POS contract ended.

Where to claim? Could you please send me the portal link? I cannot find it anymore.