Topic - Options for changing job.

folks, plz help me..

i'm currently working for a consultancy based in Sharjah SAIF (Sharjah Airport Internation Free) zone and the client whom i'm placed with is Dubai free zone company.. fortunately i got an offer from latter company and since it is a client of my current consultancy, i fear ban on my employment upon acceptance of the offer..

i have following reasons for not informing my consultancy about this offer from client -
1. they charge me 2 months salary in order to get consent, as per the contract agreed
2. one month notice

please help how can i avoid paying money and change job..

besides, am leaving country and getting my visa cancelled by current consultancy, since the client terminated the contract associated with my assignment and consultancy obliged to repatriate me backhome.. now i fear if i come back next month to join client directly, consultancy will put ban on my employment or substantial amount i should pay to evade ban..

kindly help in understanding how labour law in UAE supports this kind of work around to avoid paying money to consultancy and what after-effects can I expect..