Problem of SRUS. (srus) the reason?

I got operated for colonic inertia(subtotal colectomy-ascending to sigmoid anastomosis on 27.03.2019)20 days after surgery,I started having problems like spasms in lower abdomen,a sense of incomplete evacuation and pass stools for 4-5 times..Doc thought it is an infection and gave medicine for the same...Had 12 day course of antibiotic(1st course-5 days,2nd course-7 days)after that when i went to him he said it is due to SRUS(I have rectoanal intussusception and mucosal prolapse also SRUs)he went for sigmoidoscopy and found thr same and prescribed mesacol enema and SRfil enema.But im having problems like stool not coming out clearly(lower abdomen,rectum is getting heavy but only little stool is coming out and causing discomfort)and then Im having spasms in lower abdomen and rectum..Also feeling heaviness in lower abdomen and rectum and feeling something moving up and down in rectum and lower abdomen...Also very bad smelling gas is coming out..Is intussusception(SRUS)the reason?plz tell