Want to reduce creatinine levels.

Hi sir I am kidney patient and taking treatment but my creatinine is stable from 10 months I face hydronephrosis and my gfr is 45 to 49 approx and left kidney is filtering only 7 ml and right kidney filtering 40 ml in 2020 and creatinine is 0.9 and no protein and no high urea but on 2021 I tested COVID positive and after that my creatinine is increased to 1.5 and then settle no high urea and + protein in urine and then i consult my doctor and do needed treatment and then i am fine but my creatinine increase rapidly one it's 1.8 and then next day it's 2.3 and so on to 3.2 and i found akf which is treated and. Then my creatinine is stuck between 2.2 to 2.3 and now 6 months ago I got some uti and doctor prescribed me some injection for 7 days  and after that my creatinine is reduced to 1.89 and but 2 months ago I got uti and creatinine is stuck to 2.25 but now i want to reduce it to 1.89 how is this possible please give. a detailed answer