Very comfy, but broke quickly & they won't replace it

So, my husband and I purchased the 3 inch mattress topper from a local store where they just sung the praises of Latex Bliss. At first I was in total heaven. It was the most comfortable thing I've ever slept on. When we've had housesitters stay, everyone comments on how comfy our bed is. I wish I could give them 5 stars, alas, there are huge problems. The main problem is with the mattress topper cover. After the first wash, I followed the directions explicitly and dried it partially on cool and then let it air dry. It still shrunk. In the past 3 years, I cannot have washed that thing more than 7 or 8 times since we have a mattress protector we use over the topper, and yet the zipper broke. The entire thing just fell off. I called customer service expecting that such an expensive product that was virtually new- I mean I have not used that zipper more than, as I said, 7 or 8 times, would be replaced with an apology. BUT SURPRISE, welcome to the new corporate America, where they don't care about the quality of their product, they just don't want to pay for their quality mistakes. And their genius advice was to take it to a seamstress/tailor, both of whom told me they'd have to replace the entire zipper at a huge cost. So now we're on the hook for paying another $150 for another cover, even though ours is as close to brand new as it gets. What an awful, awful policy. I do not recommend doing business with this company. I no longer have faith in their products since it's obvious they don't have faith in them either. Extremely disappointing. And there are lots of latex companies, I'm sure you can find one that cares more about their customers and the quality of their products.