Complaint Review: Pro Tech

Contractor was hired to re-antique / reseal a patterned concrete patio. Sealer bubbled up immediately and the patio was a mess. Contractor agreed to power wash & redo the job.  Less than one week later, the job was redone, with the same result: a bubbled up mess. The contractor agreed to do the job a third time - using a different sealer. His failure to completely strip the sealer from the previous two jobs left the surface with a crazed, pitted and uneven gloss finish. The bubbles also appeared again. The Contractor was slow to respond to the third botched job & would not return my calls. He finally did come to my house (while I was not home) & left a note refusing to acknowledge the problem and honor his guarantee.