Chipotle Mexican Grill

I ordered a chicken bowl with guacamole like I do often from this location through Postmates since I work down the street. I have never had an issue in the past but this time when I opened it it had an odor and the guacamole was dark brown. It looked like it has been sitting for at least a day. I had already began mixing it up before I looked down so I thought I was crazy and tried a bite and it was sour and had an awful taste. It was already mixed with the chicken/remaining bowl and I tried to scrape it out but was unsuccessful . I ate what I could but then I couldn't eat the rest. Hopefully I don't get sick. I tried calling the store to let them know but got an automatic response. I tried then contacting postmates and they weren't any help. I'm just very disappointed and it was a $12 bowl that I couldn't eat...