Work Transfer Clause

[tenant101]

A 'work transfer clause' was put in as a rider to my lease last year because my current job at the time was only a 1 year position. Under this clause it states that I would only have to give 30 days written notice in conjunction with a letter from my new employer in order for the lease to be null and void. (A bonifide work transfer in which travel to and from the property would consitute a hardship). I would have to forfeit my security deposit if this was the case. Well, within 30 days of vacating the property, I sent in the requested information and they are trying to tell me that this is not a work transfer because it is not within the same company. However it does not state in the lease that it must be a inner-work company transfer. Please advise what my rights are.....thank you so much!!