Unfortunately, we cannot help with your issue, once the access to contract information is restrict to the company that bought the equipament. I don't have privileges enough to check if your contract is valid.
I would suggest you to open a TAC request and inform the serial number of your SX20, TAC team will be able to check if your contract is valid or not. If it is valid, TAC can address the RMA request, if not, you should renew your support contract in order to keep receiving assistance from Cisco.
You could also contact the Cisco's partner that sold the equipment to you, they will have access to check if your contract is valid or not, and I think they can address the renewal if necessary.
Tip: This is a public forum, so I wouldn't suggest you to post contract number and customer information here.
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