Master's TVs & Appliances

I initially had a contract with Flexi-Compras, and this company bought out the original holder of my contract. Master's is saying that I now owe more than I do on my washer, dryer and refrigerator than what was originally stated on my initial contract. I also had a payment schedule with the original company that mirrored my paydays and Master's now calls and demands payments that are not according to that schedule but their own and threaten me to either borrow money or they will come and pick up my appliances.