I wish I could help you more, but I'm not sure how I can help. I have social anxiety as well. Although, I don't think it's to the same degree as yours. I have cried at times, but mostly I get really, really angry. Some of what you mentioned totally struck a cord. I don't deal well with angry callers either. I was a customer service rep for a couple years and it was hard. People can be real jerks. I also take it way to personally when they yell or are just plain jerks. It's taken a long time to realize it's not me, but I still struggle not to think it's not against me as a person.

As for asking for help, that's a tough one too. I've asked for help, but not really been helped. And for sensitive people like ourselves asking is hard enough, but then not to get help...that's really rough. But I also know that if you don't ask you'll never know. I still struggle a lot with this too.

I might pick up that book myself that key_tones mentions: Customer Service for Dummies. It might help in some way.

Definitely keep working with your therapist. I hope you were able to bring up this issue to them. Hopefully they can give some pointers. Pick one and just focus on that for a day or two before you try to do another.

Wishing you the best. Some people find breathing exercises help. When I'm really upset drinking water helps. It forces me to calm down so I don't choke on the water.