Absonding from rental contract without notice.

No phone call or notice in writing. This year Harcourts Midrand absconded from their rental offices without giving notice. They had 9 months to go on their signed rental contract of 3 years which they now even deny. Come on lets be honest. They left the premises with damages like holes in every wall and their branding all over the office building. How did I find out that they had moved? The other tenants in the building informed me they had done a sneaky move out of the offices over a weekend. I received a letter after the fact to say they had moved and I should be grateful to keep their deposit. I could have the deposit in lieu of all of the damages and outstanding rental which included all their outstanding utilities for that month. All my efforts to meet with them to come and attend to the damages fell on deaf ears. A very bad experience indeed from a professional property rental company that should know and understand property contracts. I hope you will not be left out of pocket as I have been.