FTE have quite a few non-European students currently studying with them.
When did you contact them? If it's towards the end of the month they may be in the middle of assessments, a busy time for them. You can expect a delay in responses at this time.
Find a way to sort out your own visa and try them again. They're generally quite helpful.
Also, make sure to sit the assessment to ensure you'll be accepted even if you do get a visa.