No support, no answers, no corrections

I’ve been straggling to make and receive calls on my new Telkom business mobile phone, now already an old Telkom line. I’ve never had proper feedback. There reason is nothing is wrong with my phone or my line. Its the other networks that’s congested. When I use a line from any other service providers I don’t have any problems at all to any numbers. Most people have said that they gave up calling me, I’m never available. How can my business survive this. It takes me sometimes up to 29 times to get one call out. Do I even need to mention even from my Telkom to Telkom Mobile Support ....