Realtor left town and we're trying to close...

[Henley H.]

We have a property under contract and just got word today that we can close this Monday.  If we don't close Monday, we'll have to pay for an extension for a rate lock.

An issue has arisen with the sq. ft.- the realtor (who represents both buyer and seller here), listed the home at over 15% above the actual square footage.  She took the sellers word on the size- they said it's what the house's size was reported at during the last appraisal, though she never confirmed it by viewing the appraisal.

We want to address the large disparity in sq. ft. prior to closing, but our realtor has indicated she's out of town until Saturday.  We told her via text we needed to speak today, but she is unresponsive...  Should the realtor have given us a head's up she would be out of town?  Any suggestion as to how to move forward?  Thanks!