Terrible Service, No Feedback and No responsibility

Myself and my Fiance went for an eye test on 08/01/2018, we were told our specs would take 7 days. A Week later I called and followed up and was told that they would be there by the end of the Week. This carried on for two more Weeks where I would have to call (because nobody bothers to call you and let you know what is happening) and I would be told that they would be there the next day. Well the next day and the end of this Week and the end of that... turned into THREE WEEKS. I finally collected my specs on 26/01/2018 and my fiance was still waiting for his. We were then promised on 29/01/2018 that they will be delivered on 30/01/2018 by 11 am that morning. I did not bother calling to make sure that they are there because quite frankly it is not my job to keep following up with them, and I was under the impression that they would let me know if there was a problem (I should have learned by then that this is not how they work) We get there to collect the specs and everyone starts jumping up and down because the courier has not delivered them yet, my fiance finally got his specs. The final straw was on that same day we received our sun glasses and they swopped our lenses... My fiance had my prescription and I had his... We were then assured that they would order uncut lenses which would take 5 days. Today has been 7 working days and NOBODY has called to let me know when they will arrive or to follow up. I called yesterday and was told that they may be there by saturday 10/02/2018 which makes it closer to 10 days. I am still waiting for someone to let me know what exactly is happening. Simple rule in customer service, just call the customer to let them know what is happening, if your customer has to call you repeatedly because you don't contact them and keep breaking your promises you are certainly failing at your job. Spec Savers will NEVER see me again. I hope we will receive our sunglasses before I need another eye test... But one can only hope since I am still waiting for someone to call me after I had to call yesterday.