Poor Service Vodacom Fibre

I have battling for 2.5 months to resolve my fibre line speed with Vodacom Fibre. All calls logged are closed without resolution and I have to log another call and wait for another 48 hours with no escalation mechanism to senior management. I have logged over 5 calls over a 2.5 months dealing with the same issue. I have requested senior management to contact me so that I can understand what is going on but to no avail. I just want someone to call me.