DISSAPOINTED AND FRUSTRATED - PLEASE HELP

I am beyond frustrated and dissapointed witgmh Home Connect/Vumatel.. Since 2 February I have been having issues with my wifi and this after upgrading with them. They were paid in advance for February where by I did not even have wifi for a full week and 1 March they again debited my account and 2nd march I had no wifi again, my wifi is currently offline. I have attempted numerous times to reach out to speak to a manager or supervisor they dont want to let me speak to any of them. No resolution this far, I am not been taking seriously and I have to continually phone to them on my expense. I asked them to cancel my services so I can go to another provider they refuse to cancel my account with them.They cant specify as to why my wifi keeps disconnecting my cry for help and telling them I work remotely and loosing money if I dont work seems to fall on deaf ears. My daughter is on university she cant do her online classes because of no wifi Please please can somebody help me!!!!!