Advice needed for rent not collected during March - June 2020

Letting Agents

My letting agent did not send me the rent from March 2020 to June 2020 (4 months of rent). He informed me that the government allowed tenants during this time period not to pay because of the lockdown and that I will not be able to ask for this amount.
Is this information correct ?
And if so, is there any compensation that I may receive from the government.