how do i do this?

I just stopped the DD

Hey, I've left this for far too long... I had a letter from the crs and other debt collectors about paying them back £241.34. This started happening when I cancelled my gym membership through direct debit. I cancelled my membership around June / July and only did 4 months with them? I think. I missed my 1 month before and they took money out when i had money available in my bank since I normally get paid in cash where I was working. I missed another month of the monthly payment so I just decided to cancel my membership, thinking that I didn't really need to worry about anything. Next thing I know, i'm getting charged huge amounts! :/ One of my friends told me just to completely ignore what's coming my way that involves the debt collection for the gym. Since it has worked for them, and so has another friend, apparently. I'm getting worried now... I had a letter from spratt Solicitors saying that I need to owe, blah blah blah, It's pretty much the same letter as the other people that are in my situation have gotten, but I think my scenario is worse because I wasn't responsible enough and just left this to time. The letter was posted around the 3rd Nov but I didn't read it a couple days after since I've gotten Uni and my parents opened the letter but didn't get involved since it wasn't their mess and gave me a right telling off (Asian parents). Now is the 20th... What do I Do with everything?? Please help, urgent :/ Sorry for being a kid. I'm 19 and go to Manchester Metropolitan University. Thanks, Westin