Jade Garden Chinese Restaurant

I've eaten here many times.... My husband and I order take out. I get the moo shu chicken with no mushrooms. Tonight after the delivery guy left I noticed mushrooms in the food. I called to get them to fix it because I am allergic. They took ten minutes to do nothing. They told me I was wrong and it was Chinese yam and that they dont use mushrooms in moo shu chicken. I went in person to get my money back. I asked for the kitchen manager and was told he wasn't there anymore (he was when I was on the phone with them) The lady I talked to was rude and showed no remorse! I asked what it was and she said just fungus not mushroom. I asked her if I could see the bag or package and she said they didn't have it, I also asked multiple times why I didn't ever have that in my food before and she just stared at me. She said next time I have to say no mushroom or fungus.... But there is no way there will be a next time!I finally got a refund and a very sarcastic sorry. I don't recommend eating here if you have any allergies or if you think customer service is important!!!!