Hi all, if anyone on here knows anything about patio jointing/grout, would greatly appreciate your time and help with this. I had a porcelain patio completed recently and it’s been left in a bad state, with stains and all the joints discoloured / multi coloured. They were supposed to be cream in colour (blotches of this colour can be seen). Easy joint was used by the builders. They said they have never used it before. Does this seem right to you? What could have possibly gone wrong here? I paid thousands for this patio job. Looking for advice and opinion please where possible. thank you in advance for looking.