Vision Express — Spectacular Glasses coming out of frame

Address:

Vision Express - R Mall , Thane - West , Pin Code - 400607

I bought frame with glasses from R Mall thane & after using a month glasses came out from frame, when I visited for replacment they said replacment not possible & they will send the same to workshop.
After some days received product where they fixed glasses with fevi kwik.
Again after some days glasses came out & again sent to workshop...again came with same issue ...now it is almost a year & struggling for replacment