Lost its firmness and buttons extrude after 13 months

On 05/01/208, we had the Oceano Mattress delivered to us, and we absolutely loved it the first year. The mattress is advertised as the #1 rated luxury with a medium-plush feel. Thirteen months later, the mattress lost it's medium-plush feel and became uncomfortably soft to sleep on. Not only that, the fabric buttons that are anchored onto the mattress extruded, which can be felt through the mattress pad and bedsheets, causing pain when I would move around. I reached out to customer service, and they sent me a complimentary Oceano Memory Foam Mattress Topper, which is really helpful covering the buttons, however, not with the firmness of the bed. Before I purchased the bed, I had spent three weeks researching mattresses online, watching videos, and read 5-star reviews before choosing this mattress. The reviews on their website are misleading. I am unable to log on to Brentwoodhome.com to leave an honest review. I want people to know that this mattress has issues, and they should not spend their money on it unless they do not mind their bed losing its firmness in less than two years. I now wake up with cervical and spinal pain due to this bed. I honestly wish I listened to my husband before I purchased a mattress online.