Unfortunately yours will be a voice in a very large wilderness as far as that company is concerned. At the very low prices they charge for their products (as you have noted) they must sell a large number of all of them to make any sort of a viable business concern. One complaint, or even a dozen, will not make very much impact on the number of orders they must turn over merely to be able stay afloat.
Compare your complaint over a few ££ with, say, complaints over a computer system costing many ££££££. There are computer assemblers whose names appear here with alarming regularity and who, one would think reading the tales of woe, would be out of business immediately because of the sheer number and value of the complained about products. Not so, these companies can still afford to put very expensive advertisements in all of the computer magazines, in national newspapers, glossies, Sunday supplements and some even advertise on TV. These aren't the actions of a company on the verge of dissolution.
I have every sympathy with your difficulties but I don't think the actions you are threatening and, indeed, now carrying out with this thread, will make much impact on the fortunes of the company you are complaining about.