My next move would be, take all three rods to the shop, explain the situation on the one rod, if/when they say it's discontinued and cannot replace it you simply say "well I bought them as a set of three and as you cannot replace it they all need refunding/replacing for the equivalent/ comparative model. If they decide to make things awkward I normally say "not a problem,thank you for your time . My next port of call is trading standards and social media" it's surprising how quickly some companies change their tune at that point
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