Ok. Thank you for the additional information.
IF your property was legally inside the unit - - meaning that your rent was up to date, that you hadn't abandoned your unit and property, and that you hadn't been notified in writing that the rental agreement
was being terminated, etc. - - then you certainly have recourse against the business to recover your property and also to seek damages
(money) for any property taken away/destroyed by the new owners.
Before the new owners could LEGALLY remove your property, it would have to go through the notice provisions in the law, which are outlined at the following link: http://www.ok.gov/OREC/documents/Self%20Service%20Storage%20Act.pdf
If you'll look at Section 197, it says that you must be notified in writing to remove your items, and only after that can the owner take action to remove your things. If this didn't happen, then the owner would be in violation of this statute, which should give you grounds to sue for damages and for the return of anything that hasn't been thrown away or destroyed.
The first thing you're going to have to do is make contact with the new owner - - and if you and the old owner are friends, you may ask him for help. Once you find out exactly what happened, you'll know whether you can get your things without any issue, whether they've been destroyed and ultimately whether you need to consult an attorney and sue.
Hopefully, they just moved the things to another unit and you can just pick up where you left off. But, if there is evidence of burning, etc., then this may be a very remote possibility.
Thus, making contact with the owner is the first step, and if you get bad news, then you should consult an attorney about pursuing a claim for destruction of your property, breach of contract and violations under the statute above.
I hope this answers your question, but if you need anything further, please do not hesitate to ask. I'll be glad to assist you further. Thanks!