Your clearomisers sound fake at that price, but if they are putting out good vapour then I don't think they are the cause of your problem. Personally I would carry on using them and try some alternative liquid.
Joose Juice do liquids at a good price, and you can add extra flavour if you want to try that. Though they are closed for their summer holiday but only until 1st Sept which is not long now. LT Ecigs is another company that do low-priced liquids that are good. There's a long thread about low-priced eliquid vendors in the UK forum a bit further down that you might want to look through for some suggestions.
Some liquids need to steep to develop the flavours, so it might be that the liquid you have will taste better in a week or so, so don't chuck it out just yet.
If you want to try some new clearomisers then myepack.co.uk is the cheapest company I've found that do genuine branded ones. Personally I like Evod clearomisers, and am not keen on the glass ones like protank. But everyone has different tastes. The iclear you mentioned is also popular so may be worth a try. I'd recommend trying a variety and seeing which you get on with best.
If you are keen to save money, then rest assured it can be done once you find a setup you like. I saved absolutely no money compared to cigarettes for the first month, but ever since then I am saving money every week.