not going to pay in

Spec-saver in Mitchells plain Westgate mall has great service they have helped me to there best but then the problem comes in where spec-saver head office is not helping me but giving me options which I'm not going to accepting. I have had my eye test done at spec saver in Westgate mall in Mitchells plain at the time they did not have a frame that I like so I have waited on a frame. I then found a frame I like at spec-saver in Promenade, I then took a pic of the coding and went back to spec-saver Westgate mall as I only deal with them, After receiving my specs within month of wearing my specs it snapped on my face allowing the lense to fall out, I then reported it to Westgate mall and they send it away, for 4 weeks I haven't had spec and when I followed up they would tell me that they are waiting on head office to get back, after 4 weeks I received my new frame, a week after wearing it I have noticed hair line crack in the frame, I reported it and they got me another frame which I fetched and once again after a few days this one also has a crack I then reported it and now, I'm being given option on to canceling or paying in extra for a other frame which I'm not happy with, I don't feel the need of paying in extra as I have already paid for my current specs. I was up an down wasting my time and having no spec to wear for almost a year, so I would like spec-saver to sort my specs out for me as I'm am not happy with what is happening.