Are these phrases ok?

1. My hair is broken and i need some serum.

2. Can i have the refund amount transfer / send to my bank account please?

3. Why do I need to use vouchers instead of using the refund amount?

4. Can you send the vouchers in the refund amount?

5.My router is not working could you check whether your server is working or not? (does it call server? Or just say internet from the broadband company?)

6. My router is not working could you check if there are anything wrong with the wirings?

7. How do you style your hair?

8. Does styling or grooming your hair as a boy considered gay?