St Courier — worst service

I sent my documents to via st courier to lucknow on 18th july. That person is not accept my courier so they send me back on 27th july till now am not get my document in between i called customer care they wont response properly i asked when will get they said 29th morning 10'o clock but till now i did't get, they won't response properly every one pointing somebody i called nearly 50 times. Really am very upset becoz my document submition date is expired here after what can do. Don't use st courier.