Site Showing Diffrent Site In Google Cache

My site showing the cache of different site, how i can resolve such issue please help.

Would you please elaborate your question? Cant understand what you mean. did you mean your site index showing some other site, if so i am sure that you bought an old domain. Otherwise its not possible.

did you report this to them? what was their response?

Take it easy until Google update it.
If you’re really in a hurry, make backlinks to your website … It’s a way to upgrade fast.