Edgars sharing personal information with Blue label

The store gave my personal details to Blue label and they called me stating that they are from edgars ,they wanted confirmation of my details ,of which I was hesitant to give them but instead they started sharing my details with me and asking me to confirm them ,they went ahead and asked if they could give me a cellphone contract of which I asked for some time so I could check instore to see if they had a deal like that, when I went instore that very same day, I wanted to buy a product for R100 and they told me I've insufficient funds and they told me I had taken a cellphone contract with blue label and about R4000 was the down payment, funny enough the cellphone is worth R1500, courier was already on the way ,and when they got home I sent them back with their cellphone, since march they haven't refunded my 4k