Pathethic After Sales Service

We had our fibre services with Mweb switched from Evotel to Open Serve approximately two months ago, however Mweb still continues billing us for the Evotel Service. We tired on numerous occasion to call Mweb but we are being transferred from one section to another. We have also used their online methods but this also is being ignored. Their after sales service levels have deteriorated to a point were we are considering switching to another ISP and this will be reported to the Obudsman.