70, ckd-3, dm. used ceftriaxone iv.for 7 days, and then cefuroxim for 15 days for uti. but the uti didn't go away. now having oliguria. suggestions?

Complicated: This is the type of question that requires a more formal consultation as there appears to be a lot "going on". >3 weeks of antibiotics for a UTI is not typical. And it isn't clear what "didn't go away" means, as in symptoms and/or your urine didn't clear on testing? Do you have oliguria and worsening renal function or just low urine output?