Tried domain re-mapping to my website and now can't get into support again

Tried domain re-mapping to my website and now can't get into support again

I tried to re-map zoho support to my website domain but must have got something wrong.

Now everytime I click the zoho support it takes me to a dead page on my domain and I can't get back into zoho support to change the settings.

Does anyone know how to get back to the original zoho support if a wrong redirect has been entered in the mapping setting?

Thanks in advance.