Very Very Poor Internet Connection

Very dissatisfied and unhappy with the Vodacom LTE internet router, the connection is very very poor every week its a connection issue! It's been over a year trying to resolve this issue. The call centre agents are helpful but cannot resolve the technical problems of the router, they have replaced it and installed an outdoor device STILL the connection is poor, we are currently without internet at our office and have called in multiple times all we get is an update but no action. I'm stuck paying a monthly fee for zero internet usage, absolute waste of my money because I cannot cancel the contract with them.