unfair posssion of my fridge

good day my name is debra nale my I'd number is *** and my account number is *** I bought a fridge at morkels richards bay and I paid it in full than on Saturday this company cames to my house gives me a letter that says I owe them 3000rand I have to pay the money or they take my fridge I told them this is ******* but they was very rude and took my fridge I spoke to the branch manger at richards bay she to could not help me is this the type of service I get from a company I trusted for years I'm very frustrated my cell number is *** and my work number is ***