Laptop fan is broken

the other day the fan on my laptop just stopped. i didnt notice until my laptop shut itself down because it was about to melt. i hoped maybe it was just being a temperamental peice of cr*p becaues my laptop IS rubbish but its been over 24 hours now and i can only use my laptop for about thirty minutes before it gets mad hot and you can smell this weird burning plastic smell which you know cant be good. i cant watch movies or play games or even listen to music on it for any length of time, goddamn peice of junk.

i also cant afford a new laptop so im going to have to stick with this cr*ptastic peice of junk for a while longer. if the fan is truly busted how easy is it to replace and how much is it going to cost roughly? like can i just take it into a pc repair place and leave it with them overnight to fix for a few monies or is it more serious than that?

any advice would be great, cheers.