How do I recover my chaise lounger?

I bought my lounger from an individual but in the couple of months I've had it the bottom cushion slots little by little toward the front. It is attached so I cant remove it to straighten out so I figured I would fix it by taking apart then recovering the entire lounger. It is covered in a brocade material. Any help on how to fix the slipping and /or fix then recover the whole thing.Thank u...Tricia

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