Deposit Refund

I paid a deposit for a Pool Backwash Tank to be installed, which I paid for in January 2020 already, but was never installed. I have been trying to get my deposit refunded since then and the owner always promise it will be refunded, but this never materializes...So, I'm now going to take the legal route in order to get my money back which I worked hard for!! If anyone else experienced the same, kindly share here please?