For any reader's benefit, I'd just say... rescinding is not done in person, by phone, or by email. It is done by regular postal mail, preferably certified mail. Other approaches waste your time and energy - they are generally not in the protection laws or in your contract because what is written is King.
State laws where the timeshare is purchased will determine your consumer protections regarding timeshare purchases. In some states, Saturdays and/or Sundays do not "count" in the number of days you have to get a postmark on your rescission letter. In some states, all calendar days are counted, regardless of whether the post office is open or not. You should know that in many locations, mail that is dropped into a mail slot inside the lobby of a post office (ex., a Saturday when the counter is closed) may still be postmarked that day (or not). If it was me, and that date mattered, I would put one letter into the mail slot ASAP and follow with a copy sent by certified mail as soon as the post office was again open.
Kayla, I hope that by sending your letter now, it will work out for you. No harm in trying.