bigbbbadness on "Advice needed!"

I have bedbugs and I can't seem to get rid of them. The bugs are in a flat that I share with colleagues, as we have been sent to work in a different city than the one we live in. After 3 weeks and 2 treatments, I am still being bitten.
And it gets more complicated: my company is basically saying they've done all that they can do for us. They are also now saying that these new bites are actually mosquito bites (which I would maybe agree with if we weren't sleeping with the windows closed). I don't know what to do as this will be the 3rd time that I've done a full wash and bagging of my things (not to mention what I will have to throw out because it can't be washed). I've also had a look around my bedroom and can't find them anywhere. They were originally in the joints of the bed frame but it doesn't look like much is going on there, so where could they be coming from?!?
Has anyone had to deal with anything similar? I don't know what to do since my company has stopped helping. Thanks for any advice.