itune payment method
hello guys.in itune and appstore,i put mobile number as payment method.my phone had lost last week and now i use another phone.the problem is that right now after topping up my mobile number,the balance is deducted quickly even i do not make any purchases.is it probably that my phone number had been hacked.?now i put none to payment method.i am very worried to put credit/debit card for method of payment.i do not want that to happen again.what should i do?
thanks in advance