UHG is Artech's client, so I was interviewed in UH...

UHG is Artech's client, so I was interviewed in UHG and was selected there. They took whole month to release offer letter and when I joined they asked me not to come from next day due to transportation issues( which uhg and artech both didn't figure out in that one month) and later after lot of follow ups they cancelled my employment. I turned down two offers during that one month to join this company and they did this to me.
Highly irresponsible and Unethical company both UHG and Artech!!!