Fontana Holdings Refuse to Pay me back my R16,000.00

Fontana Holdings owe me R16,000 and refuse to give me back my money. Fontana deducted R2175.00 a month for 8 months from my payslip as a down payment on a R55,000 loan (R175 for insurance) to buy a Harley Davidson from the company. However after i found out (5 months later) that i was having a little bun in the oven. I had to return the Harley and keys to Fontana, however when i asked that Fontana reimburse me, i was told that they are not going to pay me back as for the money is now considered a "Rental Fee" for the period of 8 months. I asked Fontana to reimburse me R13,000 of the R16,000 and consider the maintenance (New Battery R1600.00 and New clutch Lever R350.00 and R3000.00 as a rental fee) if they still refused to pay me back. I now ask that they please send me me the Rental agreement (NOT THE LOAN AGREEMENT) that i have signed that allowed them to deduct R2175.00 from my Payslip/salary for 8 months as for my next visit will be the Police station opening a case of theft against the company.