I have over 2 bitcoins saved in the website, https://bitrez.io. and 17 bitcoins in the other website:
https://hyperhash.io I tried to withdraw my bitcions but it does not work even though I upgraded to Professional Plan towice to withdraw my funds. I contacted the sites support 4 or 5 times but no one answered. Can anyone help me to withdraw my Funds or give advices?
At 99%, you have been scammed and recovering those BTCs is almost impossible.
As other users wrote above, don't trust anyone who will help you for money.
The only service I've heard of that may be credible in this is:
https://www.coinfirm.com/products/reclaim-crypto/However, everything they do is very confidential and it's hard to get any statistics or even confirmation of their effectiveness.
If you want, at your own risk, contact them and let us know how it goes..