Himari

I have just received one month’s notice from tenants via letting Agency under ‘periodic tenency’ Terms. This is the first time I have let a property and the tenant’s have been there for 3 years. Could you please advise what I should be doing in time before they leave (27 Sept). The Agent is askin whether we want to re- let but I feel I would like to change Agents as they didn’t keep to the inspection frequency as laid out in their contract and haven’t been that helpful. I am also due to go on holiday 2 Sep for one month so will be out of the country. Would br grateful for any advice. Regards Himari