Vox Telecom poor service

Hello I need advice

Last year December I app**** for router from Vox Telecom and they said they'll deliver within 7 days. They didn't deliver and two months past, I was surprised to receive an email with billing of February. I called them and asked why am I being charged for services that I am not using because I didn't even receive the package. I told them to cancel my order since it's been two months waiting and yet I'm being charged for the undelivered service and also deactivated the debit order online. In April they delivered the package in my absence it was received by my family members and I sent them an email again with my address letting them to come fetch it since I no longer need it and I had already canceled it long time. They did not respond to my email but sent me a bill after a month that I have to pay about 3k for un returned package.