Beg for your money... dont do it vendors!

Signed up to do a "deal" with this company and we have regretted it ever since. First was told out deal would run on a Friday - great! Um no actually last minuet cancelled and rescheduled to run on a Wednesday. So slow to respond to any questions, if we even ever got a response. As a vendor your payout is:
2-3 Dats after deal ends vendors gets shipping payout
7-10 Buiness days vendor gets 70% of sales
30 Days after shipping out the product vendor gets the remaining 30% of sales
Sounds easy right?!? Nope of course not! In fact we shipped out orders right as they came through so after the deal had been completed all of our orders had been uploaded with tracking numbers and shipped out this deal ended Feb 14th. Had to email to get them to send the shipping funds to us. Once we emailed they did send them the next day. So on Feb 23rd emailed them to find out when we should be expecting out 2nd payment and their repsonse was "since it is only the 9th business day we will send it out tomorrow"... Okay fine. Only coming from Utah so should be here in a few days. On March 10th we sent a follow up email regarding the check since it was never received. Their response:
"If so, that means, this is the 5th business day since mailing the check & its coming from Utah. I know USPS has been backed up due to weather, tax season, etc.are you willing to wait and see if it arrives on Monday?
We do not send those with tracking numbers.So sorry about all this;-/ Thats a bummer!"
Okay so waited until Monday and still no check. Sent another email on Tuesday but never heard back. Sent another email on Thursday and got a automated response stating the email address has changed. Really?!? So forwarded the email thread to the new email address and got the same response as last time. Beyond frustrated. As a small business I do not have time to send out email after email. It's really upsetting that this company claims they help small businesses when in fact I have had the complete opposite. We had to order a certain amount of product, which we only sold 1/4 of. With their huge data base you'd think we would of be able to sell more, at least 50%. We fulfilled our end of the deal why is it so hard for them to send us the money we are owed. We are sure this will be the same problem when getting the remaining funds.
DONT NOT BECOME A VENDOR FOR THEM! Worst choice ever.