Sounds more like a phishing attempt to me; the sender has probably obtained your name and number from a scammer's list. The fact they mention eBay is probably a lucky guess, similar to the scam phone calls from 'Microsoft security' trying to get remote access to your PC - most computers run Microsoft software so the vast majority of the time they'll call someone who uses MS software.
Check the details for the company/originating phone number on the internet. DRS is an ancronym for (amongst other things) Debt Recovery Service and whilst there are numerous DRS companies I'm not actually sure if there is a Debt Recovery Service called DRS.
If there was a genuine debt you would have received Court papers long ago and had the opportunity to respond; if you had then had judgement made against you for a debt you would have been served with paperwork detailing the debt and only if you ignored everything would the company to which you owed that debt then go to the High Court to obtain a warrant for recovery and called in a debt collection agency.
The debt recovery process does not operate via text messages. Do not engage with this 'company' - it only confirms to them that the details they have are correct.
