英语翻译I have left two voice mails for you which are concerned

英语翻译
I have left two voice mails for you which are concerned with this problem.You have not returned either one.Therefore,this letter is my next step in hoping to solve the problem.I am kindly asking you to ask an exterminator by July 15th.If you fail to do so,I will have no choice but to make a complaint to the BBB (Better Business Bureau).