DISAPPOINTING EXPERIENCE WITH MTN'S NETWORK AND CUSTOMER SERCVICE

I've been struggling with my MTN home router since January this yea, with no reliable network connection at my place. After numerous complaint's, someone from Tel telecoms finally arrived on Thurday, the 13th to install a network booster. Unfortunately, the promised improvement in network connectivity has not materialized Infact, I feel that the network is now even worse than before the booster was installed. Its frustrating to pay for a service thats not working, and im starting to feel like MTN doesnt want me to have connectivity. To add insult to injury, I'm also paying for insurance on a device that needs me to connect to the internet at all times but I cant as its not functioning properly

I'm at my wits end and dont know what to do next . Has anyone else experienced similar issues with MTN's network and customer service?