Bad and inefficient service

I ordered the internet service and wireless modem. The modem was not

arrived on time. They sent it again, still didn't arrive on the time they

promised. Finally, I decided to use comcast. So I cancelled the service and

returned those two modems without opening the boxes. Few weeks later, I

received the bill including mothly internet service fee and charges of two

modems. I called the company, and they said that would be corrected in the

next bill. More than three months later now, the charges are still there,

and I did call the company to resolve the issue every month when I received

the bills. The customer service always told me the correction would be

updated in the next bill. What lyers they are!