Ongoing data cleansing and correction

I have a website that features events that have been sourced by different ticketing agencies. In some cases the start/end times are incorrect for the events and the address is not displayed in the correct format. Unfortunately, as the events have already been loaded into the system there is not a way of correcting them via a csv so they will need to be done manually from the front end of the system. It's not a difficult job as all the information is on the website link displayed. I require someone to check the information currently displayed and correct. Moving forward I can provide the information via csv file.