HDFC Bank — Credit card transaction dispute

There was deduction from credit card as GOOGLE CLOUD fees, but I cacncelled the subscription and then GOOGLE CLOUD returns my money, but they never credited into my credit card statement, I already shared the message from hdfs, also shared the GOOGLE CLOUD return money mail.
Everytime I talk to customer care they just said they are looking it into 48 working hours, but from last 2 months they did not resolve it yet.