My colleague took over the call, and after that I only heard his side, which went:
"I don't know that."
"Sorry, I have no idea."
"Sorry, that's not something I work with."
"No, sorry, no idea."
*incoherent yelling*
"Well, you were on the phone with the right person a while back, but you didn't want to talk to her, and now I don't think she wants to talk with you!"
The customer hung up.