"The agent has included a clause that says that I cannot take a contract with another division of the client within 6 months of the ending of this contract.
I think this is a restriction of trade and as such should be removed from the contract.
The agent is saying I am wrong. They also refuse point blank to change any of the contract"
Is the restriction that you cannot take a contract with another division at all within 6 months, or that you cannot take a contract through another agency?
I have never seen the former and cannot see the point of it.
I have seen the latter many times, as a means of the agency protecting itself from doing the upfront work of introducing you to the client & then you moving to another agency. I am not sure whether it is actually enforceable, but it has never been an issue for me.
I had one situation where I was about to work for a satellite subsidary of a large European Aersospace and Defence Company and there was initially such a clause. When I pointed out how wide ranging & restrictive this would be, the agent agreed to reduce its range.