What can be my legal remedy against the cops for lying and arresting me for no reason?

I was placed on felony probation about two months ago. As one of my conditions I am subject to searches without a warrant but I'm wondering can cops come for no reason? Yesterday two cops came to my house claiming Department of Children and Families (DCF) had sent them to do a search (I had a DCF case open which they had already sent a letter saying it was closed) I let them in without asking for papers because I am on probation. But I called my DCF case worker and he said my case was closed and there was no court ordered search. My question is why did they lie and can they come for no reason. They also asked me for my sis in laws number and where she lived (she also had a DCF case at the same time as I, which was also closed) I gave them her number but they never went to her house or even called. It’s so weird to me (I feel like I am being harassed)