Step 1 is for me to acknowledge the error and apologize to the client. Step 2 is correcting the error by promptly providing the accurate information needed. Bringing in an additional resource to confirm accuracy might be required here. The last step is ensuring you have open dialogue with the client so they see our commitment to transparency and honesty. If you are busy, mistakes occasionally happen, but taking responsibility and making concrete improvements are key to restoring confidence

From my opinion any sales representative should make full technical presentation to rebuild the confidence again . And we can get help from the presales engineers to make the technical presentation to avoid any wrong information .

The sales representative should play at this time as Consultant . And should recommend another solutions to compensate the wasted time . Also working with the client to check another products and create free trial on the new product to be sure the new product will cover the client needs .

Any organization should have Knowledge library and it must have be documented in the company website . And the Knowledge library must include all the service and product features . This tactic will build client's confidence , trust with the company and with the sales representative .

From my experience , you should aware the client with the new steps and process that you are walking on it . and give him fully progress report day by day rebuild confidence with him .

As soon as I realize the mistake, I'll admit it as delays can cause further distrust. I'll clearly explain what the error was and how it happened and offer a sincere apology without making excuses and I'll ensure I provide the correct information explaining what measures I've implemented to make sure such mistakes don’t happen again.