NO WAY TO CONTACT

I was approved for a contract consisting of a tablet and data bundle. At the time I was told that someone would be in contact with me to discuss delivery etc. The money was debited from my account last week and since then I have been trying to make contact to find out when I can expect delivery of my device. I phoned the Call Centre where a very helpful agent directed me to another number I could phone to check on the status of my contract and device as the money has already been paid. I have phoned numerous times, stay on the line for about 20 minutes before my call gets dropped. It is SO frustrating!!!! In the meantime I have paid for a product and service that I have no way of receiving.