WORST INTERNET SERVICE EVER. An appointment for DSL connection at home

I had an appointment with a Telekom technician on 26.09 to connect my DSL connection. The technician said that my telephone cable from the basement up to my apartment is broken somewhere in the middle. Two days later my janitor sent a technician who replaced the telephone cable with a new.
Since then, I booked an appointment on 08.10 for a technician to connect my telephone cable and NOONE came. I waited for 4 HOURS and simply no one showed up. I got a confirmation for a second appointment on 22.10. and again. NOONE CAME. FOR TWO TIMES, I WAIT FOR 4 HOURS AND NOONE SHOWS UP!!!!!!
Now they tell me, I must book a third appointment! WHAT DO THIS PEOPLE THINK? THAT I HAVE NO WORK AND NOTHING TO DO ALL DAY LONG SO IT IS OKAY TO WAIT FOR AN ANOTHER 4 HOURS AT HOME FOR A TECHNICIAN THAT NEVER SHOWS UP!!!!
I AM FED UP WITH THIS COMPANY.