Lower back and leg pain from 2-3 years.

Dear doctors, My mother having lower back and both leg pain problem from 3 years. In 2014 she had taken injection in back, after that upto 1.5 years problem minimised. But from 5 months same problem reported. She has weekness in leg, problem in walking, saviour pain in leg (scietica) issue. Last month she has hospitalised. We have repeated MRI of back and same problem identified I.e. disc issue in l4-l5 and l5-s1. Dr. Suggested surgery but mother was not ready for operation ,so we have taken once again injection in back and injection of calcium. But no improvement seen in  right side leg. I need second opinion from you on above issue. It's possible to recover by physiotherapy/ matrix therapy / other treatment. Also she is diabetic and BP . Please reply.