They won't give me an credit increase because they only do so periodically they said.
This is pretty standard across the industry, most companies will only give u an increase every 6 months.
I use the Amex Blue Cash Preferred card. 6% on groceries and 3% on gas plus $150 sign up bonus. There is a $75 annual fee but it easily pays for itself. If you are interested, post your email and I can send you a referral which would get you an additional $75.