Wrong billing

We have been making use of this Garden service for about 1 year. First 3 weeks they don't pitch, yet we get billed. We then get informed we have to pay before the service is rendered. We comply and make an advance payment. Two months later we are informed we are in arrears. My husband mails proof of payment to the receptionist, who promises it will be corrected. Since June 2014 no adjustments has been made. We still receive notice that we are in arrears. During Jan 2015, we give them notice due to us moving in the future, and their bad record keeping. My husband has discussed his displeasure with the receptionist, who will try to rectify the problem and get back to him, this just does not happen. I will not advise anyone to make use of this Garden Service.