Angry,frustrated,disappointed client

On 29/08, Saturday I was in PNA Worcester I was helped with friendly service and customer care, but today 31/08 Iam frustrated and dissappointed in the Somerset mall,Somerset West branches. They advertised they had sale on till 31 August.I saw a product in Worcester and was informed they can't confirm whether the other branches in Cape Town had the same product so I didn't purchase it in Worcester.Today I drove to the Cape gate branch they also didn't have the product but we asked for the number of 2 other branches named Haasendal and Somerset. Firstly I was not informed that there were 2 different PNA branches in Somerset of which 1 is in Somerset West and the other in Somerset mall. I phoned the branch Kuilsriver which is Haasendal and they informed me also that they didn't have the product henceforth I contacted the Somerset branch. Not once during my telephone conversation was I informed where this branch in Somerset was, but they had the product I was looking for. I drove to Somerset mall just to find out it wasn't at that branch. Then to my shock and disgust I was asked to drive to Somerset West if I want the specific product under the sale price. Upon asking 1 of the consultants Deon in Somerset mall if the product can be delivered to there store the answer was yes but not for the sale price as the item will be sent to the store on another date. I spoke to Kayla in Somerset West branch of which she tried to convince me to drive to Somerset West. My question is why does the client have to drive around for products if another store can request it. Why was I being told the sale ends on 31 August and the product will reach the store the 2nd. Could the store not give an I.O.U since I the client was there in the time of the sale period. Many other stores give I.O.U's to sale items if they don't have the items upon the sale period.