Answer:
medium voice - medium exit - low retaliation
Step-by-step explanation:
Medium voice - Sid complained about the high interest rates, but his complain was very mild and only through the phone call.
Medium exit - Sid will probably stop doing business with the bank only after he finishes to pay his current balance, he is not even sure to do it.
Low retaliation - Sid will not tell anyone else about his bad service experience since he is ashamed of his prior financial problems.