Delivery and customer service is a joke!

I have reported to the place of purchase that the bed I bought a year ago has deteriorated. They contacted the factory/internal sales department for restonic. They have processed the order of the new mattress and let me know the order has been completed. upon my telephonic discussion with Zulekha, ( A VERY PLEASANT PERSON TO DEAL WITH) I advised her that I would need some kind of notice before the delivery takes place as I am a full time working human being and my commute is about 90 minutes from home. She advised me that the order takes about 2-3 weeks to complete. the inspector Nicky has contacted me 11 days later and asked if I would be available for delivery the next day. I rep**** and advised him/ her again of my working situation and that I would need a bit more notice than that as i need to arrange for someone to go to my home and meet them for the delivery and evaluation. Nicky responded to my request with the words that they can only let me know 30 minutes before the delivery because they do between 6-7 deliveries a day. This made me feel like i am not a valued client at all, just another number on the delivery list for the day. and regardless of my situation that i was very open about from the get go, they dont really care. I cannot expect anyone to just jump up and leave their job because they can only let me know 30 minutes prior to their arrival? then i decided that i must also try to understand that they have a job to do, and requested for a day that the delivery might take place at least and then i would submit leave from work. Again, i received a message half way through the day that they will be doing deliveries in my area the following day. I need to go through the process of submitting annual leave. The labor act requires an employee to submit leave 48 hours prior to taking it. what am i to do as a client now? I feel like my whole interaction with Nicky has been unpleasant. the responses received on my messages are just not customer friendly. and despite of what you are required to do in your daily role, when a client reports a possible fault with your product that they have so excessively recommended to their friends, you need to go somewhat out of your daily routine or way to assist. I have tried to meet them half way , trying to understand their delivery process, but getting no help or possible solutions to this issue from them at all. to me it feels like they just randomly pick their deliveries for the day with no planning ahead, not taking into consideration that some clients work for a living. i have paid for this product, if i received it for free, i would accept this kind of treatment gladly. at no point in time was it suggested to me that they can keep my delivery for last for the day and then i can know a possible time frame of the delivery, or that they will do the delivery on another day that we have both agreed to be more suitable. I feel like i want to accept the loss of R4000. And just move on to buy a bed else where. i am so disappointed. it feels like this inspector has already made up their mind that this product will not be replaced and they have no respect for the clients time and efforts.