Thinking of asking my credit card company to freeze interest?

Hi, Basically I can afford to meet the min repayments on the credit card, but i'm being charged a hell of a lot of interest per month, I recently lost my job, and i'm going to struggle to meet the repayments in the months to come. I'm thinking of asking my credit card company to freeze the interest so I can start chipping away at the outstanding balance, but i'm worried it might not be the best way to go as they might ask for the whole balance, as I've only had the card a couple of months. Should I phone them and ask?, if so what can I say, because it's going to be hard to provide them with a financial plan, as I have no foreseable income. please advise....