On Sat, 30 Jan 2021 17:47:48 +0000, "Jimmy Stewart ..."
wrote:

On 30/01/2021 16:15, Heaven wrote:
Hello all. Please can someone help. My brand new toilet somehow got
blocked. So, I poured a cap full of caustic soda down it and some
boiling water. Nothing happened. So I kept doing it, so much so that the
crystals have totally hardened and now, the hole has almost totally
blocked up and none of the waste is being flushed away. How can I
dissolve the totally rock hard caustic soda. Can I salvage my toilet??
Can it be cleared away. (Almost 10 days now). Thank you for your help.

10 days without a tom tit ? ...

Just a thought but have you tried vinegar (acetic acid) which might
create a chemical reaction? I suggest a small amount as a test first.