You can gain valuable information including possible options in regards to proper repair. A knowledgeable tile professional should be able to share his experience and offer a means for the repair.
It is important to get an expert opinion on your tile/grout repair needs. Most professionals will either offer a free estimate or offer to use the consultation/inspection fee towards any work performed. Make sure to ask the right questions such as: are you licensed? do you specialize in repairs? what type of warranty do you offer?
A tile pro should be able and discuss your repair options and explain how he will perform the repair. He should be able to provide an accurate bid before the job has started. It’s also a good idea to get 3 bids and take some time to determine which fits your criteria.