Past / present

They issued a incorrect invoice, which was not as per the tax invoice format or regulations provided.

They issued a incorrect invoice, which is not as per the tax invoice format or regulations provided.

They can't give any guarantee on the brass electroplating of shower drain cover since it is going to use in a wet area, and also, they are saying that the brass electroplating will be damaged if we use any chemical product to cleaning them.

They can't give any guarantee on the brass electroplating of shower drain cover since it is going to use in a wet area, and also, they are saying that there is a chance the chemical could get in contact with them and cause plating damage if we use any chemical product for cleaning them.

Please help me to correct the sentences above, and advise me which one is grammatically sound?