You didn't...
He said he got his officer rank through a university reservist program :)
I would be terrified to be under the command of Junior Lieutenant Pawian!
However - back to business - if the Polish military refuses to accept you, rest assured dearest Pawian that there is space for you in the Russian military. Your old Polish body, will be made to serve Great Russia's purposes - if only for one last time.
You'll have one last chance - just one - to redeem yourself after years of running your mouth on this forum. If you serve Russia faithfully, and somehow - by some miracle - survive the meat grinder of the front - I will personally shake your hand.
If you desert, like a coward, then I will personally p*ss in your face. Apologies for vulgarity.