Original post by crazyboredReally sorry to hear about your experience. My boyfriend worked in sales (investment broking rather than telesales but still), and it really is dog-eat-dog. The managers want people who will make them money, end-off - supporting professional progression or ensuring a positive, non-stressful work environment just doesn't come into it, so I reckon you've probably had a lucky escape (though I appreciate this doesn't make the experience any less unpleasant).
One thing I would say, and I say this a lot on here, is that if you're applying for 30 jobs a day, you're doing it wrong. Every job application should be tailored to the job you're applying for - it's just not possible to do 30 good, tailored applications a day. Go for quality over quantity - research the companies you're applying for and find some way to subtly demonstrate that you've done so in your application. Look at the person spec carefully and make sure your application clearly demonstrates how you meet each point with specific examples from your previous experience: saying e.g. 'I work well in teams' is meaningless in and of itself - you need to include a specific example.
I receive CVs and cover letters, and conduct interviews, as part of my job and can honestly tell you that if I had to choose between someone with a strong CV/great experience but a clearly generic cover letter/personal statement and someone with a slight weaker CV/less relevant experience but a great cover letter/personal statement that demonstrated a genuine interest for the role, and clearly explained how the skills gain in their previous experience could transfer, I would always go for the latter.
Hope that helps and best of luck.