You are right. You saw it for what it is, a scam.
In addition to the spelling mistakes, when they call themselves "Mr." its a good indicator of scam.
But mostly, look at the ridiculously high salary: There is no way that an English teacher would get that type of salary in Spain.
Just ignore them.
It's good that you posted their email here; other teachers will find this thread when they do a research about the scammers. You will save those teachers disappointment and money.