Keep doing what you are doing and email them on a regular basis. If the job is worth it to you, then do anything!
Don't worry about whether you have made a mistake or not in not attending the first interview - there is nothing you can do about it now, so don't waste your energy worrying about it.
QA do take a long time to get back to people, for example, some of their pilots who were recruited at the beginning of the year have been waiting until now for a start date!
Persevere and you will get there if it is meant to be.
Keep doing what you are doing and email them on a regular basis. If the job is worth it to you, then do anything!
Don't worry about whether you have made a mistake or not in not attending the first interview - there is nothing you can do about it now, so don't waste your energy worrying about it.
QA do take a long time to get back to people, for example, some of their pilots who were recruited at the beginning of the year have been waiting until now for a start date!
Persevere and you will get there if it is meant to be.