Disgusting

So this is the third time spec savers messes me around. So my daughter has a problem with her eyes. The hospital gave her a script for bifocal glasses. To my understanding at the time of handing in the script it means the glasses should be half and half. When I handed in the script they took measurements and I chose the frame for her (tomato). They then contacted me again to re-take the measurements as the optometrist did not take it, I went back to the store and it was re-done. A week went by and they called my wife for us to collect the specs. Upon arrival they showed me the specs and it was the size of a minor, I was then told sorry sir, the incorrect measurements was given to the manufacturer. They told me it would be done in a few days and I demanded they get it done within 48 hours and to my surprise they did. When we were given the bifocal glasses it had the small square in the corner of the lense, I then questioned this as I thought it should be half and half. They told me no sir it is correct the way it is. 2 months later we go back to hospital and they advise me that it is incorrect and that it was suppose to be half and half. Imagine my frustration as my daughter that has a problem with her eyes has been wearing glasses(for 2 months) that is of no use as it was done incorrectly. I then contacted spec savers canal walk again and explained, they said a optometrist would call me back which he did. He then advised me that the manufacturer does not make half and half lenses anymore. My question is, upon receiving the script, was it not your duty to inform me of this, as I would've gone to another spectacle shop that can actually do what the script says. Why I went to spec savers in the 1st place is because the hospital referred me and advised me they know how to make the glasses for kids. As I would've gone to another optometrist to actually do it for me after the incident I had at the beginning of the year as per my post dated the 21/02/17. I was then advised I need to bring in the script again, and I advised him that I handed in a copy they should retrieve it and see what the script says. He then said they would and he would contact me back. I'm still waiting....How do we correct this as you guys never received a problem from me when I had to pay. How do I get the correct spectacles for my daughter. I hate complaining, but this is just blady frustrating as you can't do one thing right. It's utterly disgusting the way you guys operate.