Subscription rate

Dear Editor,  I have been receiving your magazine for years and I also gave a gift subscription to famlly.  Yesterday I received my Statement for my Renewal/Invoice in the Amount of $24.97. I cannot believe how the Price has gone UP.  I checked on-line and you have an AD/online for the magazine reading $7.97 for Renewal /and or/new subscription.  I need an explanation on my amount--Please.  Yes, I do pay by check but that should not make a difference. I DO NOT PAY ANY BILLS OF MINE ON-LINE, never did and will not start doing it.  I want to continue with GoodHousekeeping but not at this price of $24.97.    Could you please get back to me so I can resolve this situation.  I would appreciate an answer from you.  Thank You.