Bad customer experience

I am not happy with Cielo’s customer service. I purchased a double Visco pedic core plus mattress that came as a combo with a Carlisle bed valued at R13500 from the Stoneridge branch. Upon purchase, we indicated to the salesperson that we were not planning to use these goods until we moved to our house, and she verbally assured us that if the goods were incorrect, they would be exchanged. Six months later, We decided to open and assemble the bed, only to find that the mattress did not fit the bed, and this is supposed to fit like a glove since it was sold as a combo. I sent an email to the branch and did not receive a response or acknowledgement for four days. I nudged them and was told that the reason for the non-response was that the sales representative who assisted us had resigned. However, they will assign someone to follow through with my case. A few days later, I received an email from customer service informing us that they could not exchange or refund the item since it fell outside of their return period, which is 48 hours for discrepancies and 14 days from the date of delivery of the item exchange.

Cielo, please enlighten me here. How would I have known that the bed advertised as a double would not fit a double mattress? Cielo does not acknowledge selling incorrect-sized combos. I have spent a total of R70 000 within four months supporting you, and this is the treatment I receive from you. Please note that the mattress has never been sat or slept on. Please understand that my road with you ended when you failed to acknowledge that your bed is incorrectly sized, and I will not encourage my friends and relatives to purchase anything from you.