The plugin works great, as many users will attest. Sorry it didn’t work out for you, most likely some other plugin is interfering, or perhaps something your theme is doing. If you want help sorting it out, please post in the support forum. Otherwise, thanks for sharing your brilliant feedback.
For the sake of anyone else who may be reading this, Simple Basic Contact Form only sends email — it doesn’t send any “email notification”, as this person mentioned, and it so it certainly doesn’t send “each email notification four times”. The plugin wouldn’t have thousands of users if it did such a thing.