Best Swimming Pool Light Repair in Phoenix AZ

The kid never added chemicals to my pool then when we stop service they continue to bill me unbeknownst to me it is now been 8 months and received a huge late bill saying that if I do not pay this bill they will turn me into collections. They actually owe me one week's service as I quit them a week before the billing cycle ended I pay my bills online it comes directly out of my account I have the receipts no one will call me back. Anyone else have this problem maybe it's time to have a class action suit as no one will get back to me