When you say that you are having leakage, do you mean that your appliance leaks discharge onto the skin surrounding your stoma or even worse, further onto your abdominal skin.
I had a leakage problem for nine long months until I was able to locate an ostomy appliance which prevented leakage for usually 2 or 3 days at a time.
I have learned, as soon as I start to feel itching around my stoma area, I know now that discharge is leaking through my Eakin Cohesive Seal. Within a short time, discharge will begin to leak outside of my appliance, onto my abdominal skin and will very shortly begin to burn my skin. If I wait for several hours before changing my bag, which is sheer torture, my leakage will soon create a huge
opening between my abdomen and my ostomy wafer seal and ultimately a tremendous amount of leakage onto my skin or bed sheets, if I'm sleeping. I use a waterproof, washable cotton pad on my mattress every night to keep the discharge from staining my sheets.
By the way, the best stain removal product, which works to remove discharge from clothes and sheets is "SHOUT GEL ADVANCED". If I don't use this on my discharge stains, they become permanent stains.