Job dilemma-To go for it or not?

Ive been doing catering work that pays 6 quid an hour and I work max. 3/4 days a week. I need a second part time for the summer to save up enough money to move into a new flat, and go on a 2 week holiday. Im earning around 120/130 pounds a week, but I had a job offer come up thats at a charity call centre that pay 7 pounds an hour for the first few months before you get a raise (my bf worked for them and said he left when he felt like the company was sucking people dry of their money) I dont know if I could do that as a job but I have to decide quick as I said Id go meet up with them tomorrow and go for training saturday and sunday. What do you think?