How to check whether you are in blacklist ?

You can check whether you are in blacklist yourself:

W1 and W2 are managed by the same group. W5 are managed by a different group.

If w1 or w2 does not send you refill, you can order in w5;
If W5 does not send you refill, you can order in W1 or W2.

If Both W1 (W2) and W5 do not send you refill, you are banned from ordering from us.

We will not answer your email after you have banned by three warehouses because all your email are marked as read and sent to black hole.

It means that you have sent us at least two checks and we lost 500USD from your check payment. Normally you have paid more than two checks.