I don't have a Macys card but i do believe that they give increase your limit for a certain period of time.
I would wait for other responses or simply just give them a call.
hope this helps
Actually it was a year ago last month I think that I also was lured into a new bed purchase at 0%. I went into this also thinking that they'd up my CL to accomodate the bed purchase. We bought one for about $1900 (regret it...not firm enough; not Macy's fault though). They delivered it and set it up within a couple of weeks if I recall.
Here's a detailed account. Miahmarie went through this and comes to a conclusion at the end on how they report. Be sure to skip to the end:
On mine, they still report all 3 accounts. One is the revolving store charge card. One is a special event account, and one is a major purchase account.
The charge is my normal store card.
The special event carried the pruchase of the bed. They report a CL of $2500 to cover the bed and the initial reported balance was I think $1961 at 0%. EQ and EX both factored the balance and the CL. TU was an odd ball and reported the initial balance as the "high balance" and that was the CL that was factored into scoring. So, I started my first month with a maxed out CC which hurt my TU FICO. Today the balance is $781 w/ the $2500 factored into EQ and EX with TU still at $1961.
The Major Purchase account is exactly like the Special Event account but it report a $0 balance and a $0 CL from day one until now. It annoyed me in the beginning because of the new credit but I'm over it now. It was a couple of months ago that I contacted Macys about this account. The CSR was very knowledgable (and says that she's gonna visit here at myFICO) and said that the Special Event was just that, special. For some reason, Macys added the second account as a Major Purchase account and that I could use it at any time. She said that all I have to do is go to the store and make a major qualifying purchase like a bed, furniture, etc. Once I do so, then Macys will assign a CL. She also offered to have this TL deleted off my CR. I decided to hold off as in a few years, it will still report as open and really help my history and AAoA.
ETA...there was no hard pull on my end.