ICICI Bank — Amazon Pay Icici Card blocked and rewards on hold

I’m using amazon pay credit card since 1 year. My all due clear on time. My whole cash back hold as demanding commercial use. But I’m using it only for personal. It’s right it’s highly use this month.
But bank don’t have any terms & conditions on this matter.
If terms & conditions available on website.
Then I follow this.
It’s very harassment. Bad behaviour.
After resolve this matter. I cancel my all ICICI bank credit card.
Also close the savings bank account.