Can my landlord raise the rent on my Ejar contract at renewal, or refuse to renew if I don't agree?

I've rented a flat in Riyadh for three years on an Ejar contract. At renewal the landlord asked for a large increase and said he won't renew otherwise. I read about a freeze on rent increases in Riyadh. Does it apply to my contract, and how do I object through Ejar?