there is no provision for filing appeal by victim 

Subject to the provisions of rule 22, a Government servant may prefer an appeal against all
or any of the following orders, namely:-
(i) an order of suspension made or deemed to have been made under rule 10;
(ii) an order imposing any of the penalties specified in rule 11, whether made by the
disciplinary authority or by any appellate or revising authority;
(iii) an order enhancing any penalty, imposed under rule 11;
(iv) an order which-
(a) denies or varies to his disadvantage his pay, allowances, pension or other
conditions of service as regulated by rules or by agreement; or
(b)interprets to his disadvantage the provisions of any such rule or agreement;
(v) an order-
(a) stopping him at the efficiency bar in the time-scale of pay on the ground of
his unfitness to cross the bar;
(b) reverting him while officiating in a higher service, grade or post, to a lower
service, grade or post, otherwise than as a penalty;
(c) reducing or withholding the pension or denying the maximum pension
admissible to him under the rules;

You can seek appeal as per the concerned Central govt department rules in the said circumstances. If there are not express appeal procedure you can file writ petition in HC

Under ccs Rules there is no provision conferring power on complainant to appeal seeing enhanced punishment of government servant. You need to approach High Court in writ seeking such relief. High Court  has such power to direct DA to seek enhancement of sentence.

Dear client I am sorry to hear that but in this case you can definitely file in appeal against the enquiry

To punish or discharge the delinquent employee or to let him off with minor penalty is the discretion of the competent authority.

In no way the complainant can raise an objection to decision of the competent authority.

If at all he is aggrieved over this and is suffering monetarily or otherwise, he can seek remedy through appropriate laws and not by preferring an appeal against the decision of the inquiry committee or the discretionary powers of the competent authority.

There is no provision in law for appealing against the decision of the authority by the complainant in the departmental inquiry 

 If you are aggrieved by the decision and believe that this is a biased decision, you may file a writ petition before high court on the basis of the grounds you rely upon.