The organization of Metlife is disgusting and sends people in circles. There is no definitive number to contact them...there are a hundred and you will get all the wrong ones unless you check back with the original employer to what contact number they may have.
To prep blackberries for making a puree: Heat the blackberries, fresh or thawed, in a saucepan over medium heat. Add 1 teaspoon of sugar and 1 teaspoon of lemon juice for every 1 cup of berries, fresh or thawed. Heat to warm the berries through, stirring as needed. Blackberry puree can be made with or without seeds. One cup of fresh blackberries produces 1/2 cup of puree, while 1 cup of thawed berries produce 3/4 cup of puree. Store the puree, seeded or seedless, in an airtight container or jar in the fridge for three to five days.
After discarding any berries that show even a bit of mold, put 3 cups cold water and 1 cup white vinegar in a large bowl or salad spinner. Make a solution of 1 part white vinegar to 3 parts cold water. Immerse berries and swish around for about a minute. Washing blueberries in the vinegar water bath. Drain berries, then rinse with clean, cold water until any trace of vinegar aroma or taste is gone. Rinse the blueberries in cold water. Spread out rinsed berries on clean cloth or paper towels, and pat and roll lightly with towels to dry them well. Drying off washed and rinsed berries.