OUTSTANDING PAYDAY LOAN?

I live in California I owe a old online payday loan which was only about $250 now there saying they want like $600 from me they said there going to serve me courts papers for a court date because there going to sue me and I will have to pay over a $1000. They said they would try at my house and if not my work. I tried to offer them $50 tomorrow cuz that’s all I have that I can give them but they said no and good luck and that was about it. Can they really com serve me papers at work?