ADSL Line Speed Issues.

I have had almost enough of the lack of service from Telkom with my ADSL Line. I logged a complaint at their call center on the 2nd of January 2016. After a massive storm the speed dropped by almost 75% from 3.7 Mbps average to hardly even 1 Mbps today. It is intermittent with speeds of 5.8 Mbps to hardy .5 Mbps. They have sent out a technician who found nothing wrong with my installation and said he would go look at the exchange. Thereafter I drove past 5 mins later and saw the van at the corner if Dale Lace and Knoppiesdoring Street, no technician near the box. It's been 18 days since the speed issues started and I am on a business account with Telkom. Im am absolutely livid with the lack of service and communication that this company has. It is absolutely mortifying that they would treat business clients the way they do. Since they have sent the fault back to the testing center with no hopes of anyone coming and fixing my line. Very very poor service. Unacceptable in my opinion.