String Trimmers

I purchased a wheeled string trimmer on July 9 2013, ay a cost of 349.95. I used it once, July 16, for approximately 40 minutes. Upon cleaning it, I noted that the plastic housing around the string assembly is already cracked and separated, showing a 1- 2 inch linear break.
I am very disappointed in this product, especially the quality of its construction. Am I able to return the product or will I need to keep it, have it repaired and hope the replacement part is of better quality than the original?