Re: Matching Patio Slab Levels
The cheapest will be to remove the wood expansion joints and install colored mortar in it's place and live with the out of level slabs.
Next option would be to replace the slabs, which would likely be cheaper than "jacking" them, which is done by pumping concrete under the slab to raise it. Consult with local concrete companies for replacement vs jacking costs.
If the slabs have moved due to the weight of the pergola, then you need to address the footings of the pergola to carry the weight and get it off the slabs.
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