Hello my name is ***** ***** I am happy to help you today. Did he hold himself out to be a director or to have authority to sign, at the time that the contract was formed did your company exist?
Ok can you tell me a bit more about the nature of the contract that he entered into ?
So is what they are attempting to do is to get you to start the contract earlier than you want/
what date does the agreement that your son signed say it will start?
OK your starting point should be that your son is not a director or employee of the company so did not have authority to enter into a binding agreement on behalf of the company therefore the original contract is void. (you should note that there is a possibility that a court would find the contract binding on your company if they can argue reasonably that there was apparent authority). You should say that you want to enter into a new agreement starting at the right time for the company and say that if they are going to press the point with the original contract you will take your business elsewhere and you will treat the contract as void.
Hopefully they will then see the commercial sense in agreeing the new start date.
Please let me know if there is anything further you would like to know about this?