dev vs QA rant (n + 1)

So our QA is done by China team so naturally time difference is quite irritating,

I cannot change code
I cannot debug for issue

So today I fix a critical issue and before pushing it my seniors send the to the QA
> QA unavailable
> I wait for QA because nobody notifies if the code is tested and I can work ahead
> I get review that my issue fix generated another issue (page gets redirected)
> I'm angry and astonished, I check on same link, same circumstances and no such issue is found
> My seniors say read the issue properly and I do it, no positive response when I contradict the QA
> QA leaves for home on Friday and critical issue still remains in live

I cannot believe the laziness of QA, I mean it's their loss at the end of the day.

> top of that I waited 2 hours for QA to check the issue