Faulty Internet, Problem Not Solved!!!!

Our internet has been down since 12.12.15. I phoned the call center on Wednesday Dec 16 to log a complaint. The respondent tried to sort the problem out from his side. When none of his attempts solved the problem, I was told our connection was not syncing and we need a technician to come check it out. He logged a report from his side. Monday, Dec 21, I had not received any feedback, so I called again. I was told by another respondent that a technician was assigned to our case and will call us to let us know when he will come in. By Wednesday I still had not received any feedback so I called again. The guy I spoke to checked our connection from His side and told me our connection is not syncing. When I asked when will a tech come in he couldn't give me an answer, he said the best he can do is to send another report to his manager, which he did. Thursday, Dec 24, a technician came to my house unannounced. My dad dealt with him. He replaced the cable connection outside & the input jack inside our house. He tested our tel line and internet & it seemed to be working. After he left the problem came back again. I called again, and was told the same story, our internet weren't syncing.