Poor service

Hi, I am so disappointed at Spec-Savers Kolonnade. I took my son on Sunday, 8 Sept to choose a frame for his new prescription. I asked them to find out if they can reduce the thickness of the lenses because last year they could not do it because of the type of frame that he picked. On Monday, 9 Sept they phoned me to inform me that it is possible with that frame. They gave me the quotation and I paid the R4261 in full. They said it will take 7-10 days. So far so good. I went there on Friday, 20 Sept to find out whats going on because I didn't hear anything since 9 Sept. Only to hear the glasses is not ready yet, it will be finished next week (this week). Wednesday, 25 Sept passed...... Do not tell me it will take 7-10 days if you can not keep your promise ..... This happened before, stupid of me to give Spec Savers Kolonnade another chance. It's not only me that's disappointed, but a child as well....