Collar Guaranteed

Bark collar does not work! Help!?
I have a cup of tea / Toy Poodle. She is full grown 4 lbs. He barks at everything and everyone is so tired of it. This has been going on for a year. I try to give a slight bump, but that does nothing. I tried a muzzle XS, but then only howls that is much worse. I tried a bark collar (guaranteed) and very large, but it worked about 2 times and she screamed and ran. He stopped barking that night. Then, next day I wore it and I think he got used to it, because no matter when I put it, it never effects. And I tried to put new batteries in someone pleasee help me!
You can try a bark collar citronella. I had a Pekingese who loved Mustve Zapped because only keep barking. After I changed citronella collar, he hated getting his face sprayed with citronella and went off the bark. And my place smelled great too!
Training A Dog With A Shock Collar