Yes – you can stop the cessation process if you change your mind – but if you have submitted your striking off form (DS01) to Companies House, then you have advised Companies House of your intention to dissolve your company.
If you change your mind at this point, then you have approximately two months to stop your company being dissolved if you still wish to retain it.
In these circumstances, you can submit a DS02, withdrawal of a striking off application by the company. However, if you are approaching the two month period following the submission of your DS01 to Companies House, then the striking off process cannot be stopped (Companies House will generally advise you of this). If these circumstances apply to you, then you should contact Companies House to advise you wish to keep your company.
From a practical point of view, if you have changed your mind with regards closing your company, then you do have to return it to its former status – so any HMRC schemes such as PAYE and VAT will require setting up again to allow you to continue as before.