Faulty network

My Telkom LTE unlimited internet connection is faulty. I am working from home and the connection is so bad I cannot even attend an MS Team's meeting. My husband is a call center agent working from home and his connection is cutting all the time. We are struggling to work like this and this could get us into serious trouble at work. We might even need to go back to the office meaning that I will pay almost R900 a month for nothing! I did phone customer care serviced recently and they advised that they would send a technician to my house to see what the problem is but nothing. Please We need help I need to know should I buy a new router or what is the problem. Please this is making our lives even more complicated then what it is already. The stress is way too much We need assistance Immediately today!