Lewandowski, 24, believes he had been given assurances that he would be able to exit BVB in this transfer window, with Bayern Munich a likely destination.
But he is adamant the club have reneged on a deal which would have seen the Poland international leave Signal Iduna Park this summer.
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"I was certain I would be given the green light for a transfer.
"Now all of the sudden everything is different. Unfortunately, I'm forced to stay. I'm astonished at how they're treating me.
"I have to accept that I have to stay in Dortmund."
Lewandowski is set to remain at Signal Iduna Park and run down the rest of his contract which ends in June 2014.
The former Lech Poznan striker started life slowly at Westfalenstadion, but over the past two seasons has emerged as one of Europe’s leading attackers, epitomised by the four goals he scored in a memorable night against Real Madrid in the Champions League semi-final.
The Pole has scored 75 goals in 136 appearances for last season’s Champions League runners-up.