Would you adam and eve it, they supplied it with a 6g pack of yeast! Looks like a trip to my local homebrew shop is in order to grab some more ale yeast. How much would you recommend I use please?Welcome to the forum.
This might be of help since you are just starting out
Basic beginners guide to brewing your own beer from a kit - The HomeBrew Forum
I would also check the yeast before you start your brew. If it comes in a packet that weighs about 7g it might not be enough, and your brew might stick i.e. finish before it should. Muntons, who make this kit and similar kits like the Wherry have acknowledged there is a problem and have said their new kits will have more yeast. The normal recommendation is to substitute the yeast. Wilko sell an ale yeast which is fine.
More here
Simple strategies for dealing with stuck fermentations