Suggest Treatment For High Creatinine Level

My mother (in Dhaka, Bangladesh) has high creatinine problem for past 7 years. It was always around 2. However, recently, more precisely for last one year, her creatinine level has gone up with an average of around 3.5. She has been under supervision of a doctor for the past seven years, who always gives her medicine to control blood pressure/ sugar level and advises to maintain kidney friendly diet. My mother has tried her best to follow the doctor, but nevertheless, her kidney damage is worsening day by day. At this moment, we are wondering if she is getting the right treatment. Could you please give us any insight on what type of measures we can take for her right treatment?