Poor service i am getting with Vumtel or whatever they call it SADV

Poor service i am getting with Vumtel or whatever they call it SADV. I have money on my account, they never debit it. It has been 6days now without inter. At Vumtel or SADV please come collect your router and your cable. I am fed up with your service. Keep on texting +***5 on Whatsapp but no help. Called ***2 but they can't help me with the number for SADV but they said i must contact SADV.