No response wrt issue

Been waiting since the 11th for my issue to be resolved which is well past the 48 hour response time. I've spoken to 3 *********** staff that don't know how to follow up even after stipulating that they will. I tried speaking to a manager however they always happen to be busy and even if an assistant logs a call request, such as the one I was meant to get this morning, the manager nor the assistant don't follow up.