This is the reply I got from their Customer Service rep. I think you should totally call again, or at least send them an email. Don't see Bulga on the list of exclusions! good luck!
You may place the order and go ahead and email
or call us with the order/invoice number and we can take the discount
off for you once we check that you are a first time customer. Please
remember that do to the manufacturers request, we are not allowed to use
code matching and coupons on the following brands: Kooba, Seven For All
Mankind, Hudson Jeans, Nudie Jeans, True Religion, Joe's Jeans, Citizens
of Humanity and Paige Denim and Botkier. I understand that this can be
an inconvenience, but unfortunately it is a restriction placed upon us
by the manufacturer. Thank you for your understanding and we look
forward to doing business with you!