TM kiosk in COSTCO and COSTCO egift card

Funny you bring this up.  We did 5 phones and have NEVER had such an awful time.  I too had the $200 per line, I check rebate status and it says UP TO $150.  Not to mention the rep we interacted with at the kiosk blatantly lied.  Like bold face.  More than once.  Called tmobile CS.  After 3 HOURS across 2 calls, and then a 3rd - never received a call from management despite every rep noting I requested it on the account.  We're still not close to having our bill the way it should be and I anticipate another call in the future once the credits are done (mind you the credits weren't at the value we were informed of either).  Incredibly frustrating.  Having the $200/line costco rebate was the only thing that was making this somewhat tolerable.  So, long story short.  We're still waiting too.