Steak 'n Shake review: got sick from drinks

My son and I ate there last night 11-21-2019, one of our usual spots to eat.
Our waitress Jamie B asked us to pay before we was done eating so she could cash out and leave, odd but ok we did.
We finished our meals and shakes and had no waitress so went up front to ask for 2 cherry cokes to go, guy asked us if we paid which I told him we did and he was gone for a bit to get our drinks, I asked him about the shakes if they could mix up two if the new ones together and he said no only specialty shakes and I thanked him for the soda's and my son and I left.
Shortly afterwards we went shopping and I got a very bad belly ache, then my son did moments later. We both got the [censored]s very bad.
I gave the cherry coke to my little girl when I got home not relating it at all to the soda at this time, then she woke me up with extreme belly ache and had the [censored]s.
Now noe of our other kids or my husband was sick, ONLY the 3 of us that had cherry cokes.
I think our drinks got something put in them.
I think either drugs or laxatives or something.
I called the store and didn't even talk to the main manager as he was busy but talked to another manager and all he said was I'm sorry.
Well that is bs cause like I told him and saying here I think something was put in our drinks, drugs, laxative or something.
I still have the rest of the soda in my frig as we didn't even finish it cause we all got the bad belly aches.
What can be done about this. Very bad experience and horrible customer service!
Going to a restaurant that you eat at often and thinking you was given something in your drink is a HORRIBLE experience, let alone the bad customer service asking to pay before we are done eating so she can cash out and leave!
What can be done about this?
Steak n Shake NO:167
Table 21 Pty 2.
Name Jamie B
11-21-2019 3:24 pm