Slowest service ever

On 20 May 2018 I went to Spec-Savers and handed in a prescription and chose a frame. On 7 June, upon collecting my spectacles, I found that the incorrect frame was used and when I tried it on, I was not confident that they have used the correct script. They promised to investigate and come back to me. And later the evening I was phoned and told that they would rectify the situasion, but would prefer to do their own eye test . They promised to phone back to arrange, but I heard nothing. On Saturday 9 June, I had to phone them and then they refused to make a special arrangement to come for the eye-test. And so I had to wait another week for they eye test performed 16 June. I was told they would make haste, since I was now already 2 week waiting for my spectacles. Today I was informed, a week and a half later, that my specs were not ready, due to some treatment they still had to put on my specs and they are waiting for something from the USA, I have no clue what. And sorry, but the next estimated date for my specs will only be next Wednesday. I find this absolutely unacceptable. In the first place, they should have accomadated me IMMEDIATELY for the eye test and not make me wait a week for an appointment. And now this delay, after being promised that they will speed up the delivery of my specs. NEVER EVER will I go back there in future.