Need Help With Drainage Cleaning

Hi, This is Stanley from Mississauga. We had a party at our house last week. The guests had encountered a problem with the bathroom drainage. Continuous use of toilet leads to blocked drains and bad odour. Now bathrooms are a mess.

Moreover, when renovated the house a couple of years ago, they didn't seal the white grout in the toilet and since the cementitious grout is porous it absorbed stains quickly. Already tried some alkaline cleaners, but the stain is still there. Someone told not to use acidic cleaners because it will damage the grout in the long run. Is it true?

Anyway, now I'm thinking about consulting a professional cleaning service. Since it's not that easy to clean on our own. Yesterday I found a good quality cleaning services firm on the web. I think they are pretty good, but before calling them, I would like to hear from you. What do you guys think?
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