Whirlpool Freezer Started Leaking in Just Over a Year

I purchased  a Whirlpool Gold line version  Refrigerator/Freezer along with several other Whirlpool appliances. After just over a year ice started forming in the bottom of the freezer and then leaks out during nightly defrost. Cleaned it up twice but continues to happen. Whirlpool customer service was useless saying I should have bought the extended warranty even though it is happening at 13 months. I wouldn't buy another Whirlpool product based on the quality and the customer service I experienced.