Hi,
It is definately possible to get an integrated washing machine for under £350.
This Indesit is £324 and has 4.3 out of 5 on customer reviews:
http://bit.ly/avkA63
Or this Hotpoint is a little bit more expensive at £339, but has a customer rating of 4.5 out of 5 and Hotpoint are...
Hey,
What about this Hoover Fridge Freezer - It is 190cm tall - massive if you have ever stood next to an appliance this size! and 54cm wide.
It get 4.6 out of 5 on customer reviews as well
If you only brought it in October, it should still be under manufacturer warranty. Call comet and you should get it sorted out or replaced free of charge
Reviews for this model Hotpoint are average.
Look at this Indesit Moon model - similar in colour and price to the one you are looking at, but looks really sleek and has better reviews...
You can get slimline dishwashers as small as about 44.6cm wide
http://www.appliancesonline.co.uk/product_listings.aspx?action=sort&PageNumber=0&sortBy=price&sortOrder=asc&existingCanonical=true&pageSize=12
but I think you will definately struggle to get anything smaller.