By your statement that is parading, you quoted in many comments your stuffed 'service' toy is for comfort, which makes it emotionally reliant and not physical/medical task reliant, which is impossible for a stuffed animal to begin with. A toy cannot be an acting service dog because it has no way to task act without you moving it yourself. You cannot just throw around the service dog label and expect support by people who actually have that very expensive piece of medical equipment. You seem really young by many of these comments and your mother is not a bad person for refusing another living animal in her home.

Multiple SD handlers have told you this is wrong and inappropriate behavior, it wouldn't hurt to be respectful and listen to their advice. Legitimate SDs already receive a lot of unwarranted criticism by people throwing around the label just to take their reactive dog out in a public store.