I have been in a small rented office years as an employee,

I have been in a small rented office for two years as an employee, paid for by a company i worked for. I also have my own company that paid half of the rental cost per month. Both in the same office. The property owner has a lease agreement with a two month break clause for both my own company and that of the company that employs me (half cost each). I signed both agreements as an employee and a director of the other. I have ensured I have paid my own companies part of the cost from my own comany each month and the company I work for have paid each month their half from their account. The company I work for suddenly stopped their payments. I therefore paid the 2 months missed payments from my own company account to support their half and have been paying In full each month as the landlord said if payment are not met in full, i would be out! I am trying to claim the loss to the company I worked for as I assume as the lease was in two seperate company names, 50% is their responsibility and they have not given notice to the landlord. I am concerned that as I have paid this supposed debt off from my own company, that the company I worked for, are leaving without any liability. Basically I paid their share and I ask if I can claim this back from the company I worked for as I in fact, had to pay this.