As already suggested and appreciated by you, you may show all docs, agreement signed by you, communications, evidences on record to a very able local senior counsel specializing in labor/service matters for a considered opinion.
Labor/Service matters is altogether different filed of law and at each location there are a few counsels that specialize in it and they are very well known.
Usually such matters are referred to them by any counsel worth his/her salt.
Lawyers handling civil matters usually do not meddle in Labor/Service matters.
Inquire locally for such counsels and you will have a list of all such few counsels at your location.
Chose carefully, a counsel that suits you.
Use the inputs received by you in this thread in your future endeavors.
Online discussions have its own limitations and are not substitute for considered opinion and consultation with due examination of relevant docs and inputs in person with a counsel specializing in respective field of .
There are endless numbers of threads at LCI also by unsuspecting querists that have been fleeced by posers posing as expert lawyers.
The discussions at LCI are FREE and should not be exploited as a medium to allure unsuspecting querists to pay a FEE in the name of so called consultation……………