Breach of Contract. ********* business practises

23/10/2017 14h50. I went to Edgars Mall of Africa to buy some goods and query why my account was now a 12 month account generating interest instead of the 6 month interest free account that I had initially opened. The lady helping me was Mapula confirmed that the system converts a 6 month account into a 12 month account if you don't qualify or meet the requirements. Was very strange as I have an excellent credit record. she then proceeded to phone an edgars call centre and let me speak to another lady by the name of Gugu Moyo - not sure if she gave me the right name. This person was not the most pleasant or helpful and gave me the same reasons and confirmed that nothing can be done. This must be some sort of ***** or breach of contract as I specifically would've not wanted an interest generating account. Will try to seek some legal counsel. Very bad service from Edgars.