bad delivery service

my question is why are we told to pay for products that they do not have in stock. My name is k****tso i went to diesploot chuma mall fair price to purchase a washing machine which was on the 16 August 2025 and i was told that they do not have it in stock i should expect delivery 1st week of September 2025 , well me hearing that i was like sure i have a machine already i just need a bigger one i will wait. 1st week passed and i called on the 3rs week of September and i was told they do machines on their system however when the delivery guys goes t the warehouse and scan the machines are not there. i am the one who called the store all the time no one bothers to contact me as a client.Today marks 2 full months and i haven't heard anything from the store. I do want my funds back because i purchased a machine and promised delivery. If the money was in a bank for this 2 months i would have better interests. so i need to know how are customer paying for something that they have on display but don't have it in stock.? is this how customers are treated ? i have bought things at fair price before but it was on lay-by this is my first cash Purchase and i am in disbelief. I have never received this kind of service