2 Months to upgrade my LTE contract

My current LTE contract expired in December. I have been trying now since December to get hold of Telkom to upgrade my contract from the current 10GB bundle to 30GB. I have mailed them, sent messages on their website and phoned them. Left my details with 3 different people who said they will get the relevant department to phone me. My last call to them lasted 42 minutes in which I spoke to 2 people for about 5 minutes. The last person I spoke to said she will get her supervisor to phone me and I am still waiting (3 days later). This is absolutely shocking especially after the brilliant service I received when I first got the LTE.