KSI Law will sue me in 2 days

I have an outstanding loan with money mart for 3800 that I have to pay back. They said I have 48 hours to contact them but they pick up but as soon as they transfer me to the money mart person but they won’t pick up it’s a Tuesday and I am calling at 2 pm. I’m autistic and don’t have much money, I only work a part time job now I’m scared please help.