Unsigned for deductions

Got a phone contract. Africa mobile deducted 3 payments in one month, got bank statements to proof it, do i refused to pay for may as according to me, im paid upfront for 2 months due to 3 deductions out of bank account. Numerious calls, emails, watsapp messages and still theyve locked phone. Did another payment end of may but still phone remains locked. I need answers and fast.taking this case to court as this seems like one big ****ming bussiness. Better to contact ***