Besides other bitcoin mixer I would suggest the OP to try the bitblender bitcoin mixer.
You can check the link on my signature and here are some of the details that you should know:
- Randomized service fee (1-3%)
- Customizable delay (optional, up to 99 hours)
- Multiple address withdrawals (optional)
- Optional 2FA (Two-Factor Authentication)
i think is very long time is delay until 99 hours
standard fee in bitmixer 1.3661%
but can setting in follow FAQ in fee only Our minimum fee is 0.5% plus 0.0005 BTC for every forward address.