Disgusting service since 1.12.2021

Since the afternoon of 1st December 2021 my reception dropped from 5 bars to between 0 and 1. On the 8th December 2021 their customerservice department issued me a case number *** and assured me my problem would be resolved. After numerous emails and numerous Hellopeter complaints we have not progressed at all. On the 10th January 2022 customerservice department informs me that the Technical Department will contact me to resolve the issue. On the 11th January 2022 the Technical Department tries to phone me...................Hello I've no reception so they leave a voice mail which is so unclear because of the reception and sends me an sms to phone 084135. How must I do that with virtually no reception. The good news is Mr Douglas Stevenson CEO is that I only have 17 months left on my contract and you know what you can do with that when it ends. Finally Mr Douglas Stevenson to you know the definition of client????????????????