Strange format appeared after publishing

Hello there, very much appreciate help to resolve the below problems.
I had updated a few pages of articles since a few days ago for my landing page and another page. Then, I realised that the formats became completely wonky after publishing.
I have changed to a new page by copying and pasting information from saved word docx.
However, the problem of these pages persists. I had to inserted a table of pricing but found that the original format of excel word is completely off too.
Have never encountered all these problems before.

What do I do to correct this quickly?(Not tech savvy and no coding background)

Hope to hear from a respond to resolve this please.
Thank you very much.

Regards, Kim

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