Accredited TEFL courses?

Can anyone recommend a reputable company for TEFL courses? I want to look into teaching English as a foreign language and want to avoid being ripped off.
Update: For clarity, I am based in the UK. I have looked at university courses and they all require a degree. Is that strictly necessary? I don't have that level of education. I don't want to do a course that will not gain me employment.

Grateful for any and all advice. Thanks.
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