i asked for the control to be opposite shower head wall (shower is 60x26) the floor of shower is now 4 inches above bathroom floor. without the curb. originally asked contractor for curbless and was told no but that he could do very low curb. my husband thinks it should have been trenched down a bit. contractor is blaming it on the house being old. second pic is what i'm assumong is the drain. advice? thanks

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