Why customer service nor sale associates there doesn't pick up their phones.If you have the luck to speak to one of them they put you on hole and never come back to assist you? Very bad for business.

It means that the store has many cutomers and a lot of activity. If this happen often, they have to adjust the amount of staff to handle the demand of activity. If you kindly leave a comment in their customer service page in their website, they will take it in consideration and thank you for it

Yes they do that sometimes