(a) The circuit court shall have supervision and control of all proceedings before magistrates, by mandamus, prohibition and certiorari.
(b) Except in cases confined exclusively by the Constitution to some other tribunal, the circuit court shall have original and general jurisdiction of all matters at law where the amount in controversy, excluding interest, exceeds $7,500: Provided, That the jurisdictional limit on amounts in controversy does not apply to real estate installment sales contracts.
(c) The circuit court shall have original and general jurisdiction in all of the following matters:
(1) Habeas corpus;