Smart meter

Hi all, I had my smart meter fitted yesterday Friday the 12th, the fitting guy told me it would take up to 48 hours to show any data, my problem is that the smart meter isn’t even showing the time of day anymore and just wondered if anyone else had the same problem, it was showing the time when he left and all evening it was just bleeping so I turned it off , turned it back on this morning and time at 00.00