Bad customer service and bad quality

On the 29 November 2023 I purchased a Sealy avoque bed set at sleep masters at soshanguve crossing. Was happy since I've been longing and searching for a bedset for a while, so went to the shop and paid cash and had the bedset same day. Only to find the the springs were making noise on the right side of the mattress. In the morning I called and even went to the shop only for them to tell me to wait 7 days until they can lodge a complaint on my behalf. I said why should I wait that long and also told it would take me 4 weeks plus until they can actually attention to me. My worry is how come should I wait that long and also why is it such a hussle for them to just take the bedset and refund me since I don't owe them a dime? I really loved this brand but after all this bad service and bad quality I'm just regretful on my purchase. I just want value for my money that's all because I work really hard to be treated this way.